Annual report pursuant to Section 13 and 15(d)

Borrowings (Details)

v3.20.1
Borrowings (Details) - USD ($)
1 Months Ended 12 Months Ended
Feb. 29, 2020
Aug. 31, 2019
Feb. 28, 2018
Feb. 29, 2020
Feb. 28, 2019
Feb. 28, 2018
Jul. 31, 2019
Jun. 30, 2019
Oct. 31, 2018
Sep. 30, 2018
Aug. 31, 2018
Nov. 30, 2017
Jul. 31, 2017
May 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Nov. 30, 2014
May 31, 2013
Short-term Debt                                    
Short-term borrowings $ 238,900,000     $ 238,900,000 $ 791,500,000                          
Long-term Debt                                    
Other, Current 11,700,000     11,700,000                            
Other, Long-term 13,600,000     13,600,000                            
Other, Total 25,300,000     25,300,000 28,900,000                          
Long-term debt, Current 734,900,000     734,900,000 1,065,200,000                          
Long-term debt, Long-term 11,210,800,000     11,210,800,000 11,759,800,000                          
Long-term debt, Total $ 11,945,700,000     11,945,700,000 12,825,000,000.0                          
Partial repayment       2,195,300,000 62,800,000 $ 7,128,700,000                        
Make-whole payment   $ 1,500,000 $ 73,600,000                              
Unsecured debt [Member]                                    
Long-term Debt                                    
Percentage of outstanding principal amount as redemption price 100.00%                                  
Unsecured debt [Member] | Senior credit facility, Term loan [Member]                                    
Long-term Debt                                    
Unsecured debt, Current $ 0     0                            
Unsecured debt, Long-term 0     0                            
Unsecured debt, Total 0     0 492,800,000                          
Unsecured debt [Member] | Term loan credit facility [Member]                                    
Long-term Debt                                    
Unsecured debt, Current 24,500,000     24,500,000                            
Unsecured debt, Long-term 1,271,200,000     1,271,200,000                            
Unsecured debt, Total 1,295,700,000     1,295,700,000 1,486,400,000                          
Unsecured debt [Member] | Senior notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Current 698,700,000     698,700,000                            
Unsecured debt, Long-term 9,926,000,000.0     9,926,000,000.0                            
Unsecured debt, Total 10,624,700,000     10,624,700,000 10,816,900,000                          
Unsecured debt [Member] | Three-Year Term Facility [Member]                                    
Long-term Debt                                    
Unsecured debt, Total 499,600,000     499,600,000                            
Debt instrument, face amount $ 500,000,000.0     $ 500,000,000.0           $ 500,000,000.0                
Interest rate 2.80%     2.80%                            
LIBOR margin 1.13%     1.13%                            
Unsecured debt [Member] | Five-Year Term Facility [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 317,100,000     $ 317,100,000                            
Debt instrument, face amount $ 1,000,000,000.0     $ 1,000,000,000.0           1,000,000,000.0                
Interest rate 2.90%     2.90%                            
LIBOR margin 1.25%     1.25%                            
Partial repayment       $ 645,000,000.0                            
Unsecured debt [Member] | Term Credit Agreement [Member]                                    
Long-term Debt                                    
Debt instrument, face amount $ 1,500,000,000.0     1,500,000,000.0           1,500,000,000                
Unsecured debt [Member] | 2019 Five-Year Term Facility [Member]                                    
Long-term Debt                                    
Unsecured debt, Total 479,000,000.0     479,000,000.0                            
Debt instrument, face amount $ 491,300,000     $ 491,300,000       $ 491,300,000                    
Interest rate 2.50%     2.50%                            
LIBOR margin 0.88%     0.88%                            
Unsecured debt [Member] | May 2013 Eight Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 499,200,000     $ 499,200,000 498,600,000                          
Debt instrument, face amount                                   $ 500,000,000.0
Basis points above adjusted treasury rate 50.00%                                  
Coupon rate of notes 3.75%     3.75%                            
Unsecured debt [Member] | May 2013 Ten Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 1,046,400,000     $ 1,046,400,000 1,045,400,000                          
Debt instrument, face amount                                   $ 1,050,000,000.0
Basis points above adjusted treasury rate 50.00%                                  
Coupon rate of notes 4.25%     4.25%                            
Unsecured debt [Member] | November 2014 Five Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 0     $ 0 399,100,000                          
Debt instrument, face amount                                 $ 400,000,000.0  
Basis points above adjusted treasury rate 50.00%                                  
Coupon rate of notes 3.875%     3.875%                            
Unsecured debt [Member] | November 2014 Ten Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 397,000,000.0     $ 397,000,000.0 396,400,000                          
Debt instrument, face amount                                 $ 400,000,000.0  
Basis points above adjusted treasury rate 50.00%                                  
Coupon rate of notes 4.75%     4.75%                            
Unsecured debt [Member] | December 2015 Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 396,300,000     $ 396,300,000 395,800,000                          
Debt instrument, face amount                               $ 400,000,000.0    
Basis points above adjusted treasury rate 50.00%                                  
Coupon rate of notes 4.75%     4.75%                            
Unsecured debt [Member] | December 2016 Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 595,900,000     $ 595,900,000 595,400,000                          
Debt instrument, face amount                             $ 600,000,000.0      
Basis points above adjusted treasury rate 25.00%                                  
Coupon rate of notes 3.70%     3.70%                            
Unsecured debt [Member] | May 2017 Five Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 497,800,000     $ 497,800,000 496,800,000                          
Debt instrument, face amount                           $ 500,000,000.0        
Basis points above adjusted treasury rate 15.00%                                  
Coupon rate of notes 2.70%     2.70%                            
Unsecured debt [Member] | May 2017 Ten Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 496,100,000     $ 496,100,000 495,600,000                          
Debt instrument, face amount                           500,000,000.0        
Basis points above adjusted treasury rate 20.00%                                  
Coupon rate of notes 3.50%     3.50%                            
Unsecured debt [Member] | May 2017 Thirty Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 493,000,000.0     $ 493,000,000.0 492,900,000                          
Debt instrument, face amount                           $ 500,000,000.0        
Basis points above adjusted treasury rate 25.00%                                  
Coupon rate of notes 4.50%     4.50%                            
Unsecured debt [Member] | November 2017 Two Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 0     $ 0 598,600,000                          
Debt instrument, face amount                       $ 600,000,000.0            
Basis points above adjusted treasury rate 10.00%                                  
Coupon rate of notes 2.00%     2.00%                            
Unsecured debt [Member] | November 2017 Three Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 698,700,000     $ 698,700,000 696,800,000                          
Debt instrument, face amount                       700,000,000.0            
Basis points above adjusted treasury rate 10.00%                                  
Coupon rate of notes 2.25%     2.25%                            
Unsecured debt [Member] | November 2017 Five Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 695,500,000     $ 695,500,000 693,900,000                          
Debt instrument, face amount                       $ 700,000,000.0            
Basis points above adjusted treasury rate 15.00%                                  
Coupon rate of notes 2.65%     2.65%                            
Unsecured debt [Member] | February 2018 Five Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 597,000,000.0     $ 597,000,000.0 596,000,000.0                          
Debt instrument, face amount     600,000,000.0     600,000,000.0                        
Basis points above adjusted treasury rate 13.00%                                  
Coupon rate of notes 3.20%     3.20%                            
Unsecured debt [Member] | February 2018 Ten Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 694,300,000     $ 694,300,000 693,800,000                          
Debt instrument, face amount     700,000,000.0     700,000,000.0                        
Basis points above adjusted treasury rate 15.00%                                  
Coupon rate of notes 3.60%     3.60%                            
Unsecured debt [Member] | February 2018 Thirty Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 592,100,000     $ 592,100,000 592,000,000.0                          
Debt instrument, face amount     $ 600,000,000.0     $ 600,000,000.0                        
Basis points above adjusted treasury rate 20.00%                                  
Coupon rate of notes 4.10%     4.10%                            
Unsecured debt [Member] | October 2018 Senior Floating Rate Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 647,900,000     $ 647,900,000 646,800,000                          
Debt instrument, face amount                 $ 650,000,000.0                  
Unsecured debt [Member] | October 2018 Seven Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 496,000,000.0     $ 496,000,000.0 495,400,000                          
Debt instrument, face amount                 500,000,000.0                  
Basis points above adjusted treasury rate 20.00%                                  
Coupon rate of notes 4.40%     4.40%                            
Unsecured debt [Member] | October 2018 Ten Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 495,200,000     $ 495,200,000 494,700,000                          
Debt instrument, face amount                 500,000,000.0                  
Basis points above adjusted treasury rate 25.00%                                  
Coupon rate of notes 4.65%     4.65%                            
Unsecured debt [Member] | October 2018 Thirty Year Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 493,000,000.0     $ 493,000,000.0 492,900,000                          
Debt instrument, face amount                 $ 500,000,000.0                  
Basis points above adjusted treasury rate 30.00%                                  
Coupon rate of notes 5.25%     5.25%                            
Unsecured debt [Member] | July 2019 Senior Notes [Member]                                    
Long-term Debt                                    
Unsecured debt, Total $ 793,300,000     $ 793,300,000 0                          
Debt instrument, face amount             $ 800,000,000.0                      
Basis points above adjusted treasury rate 20.00%                                  
Coupon rate of notes 3.15%     3.15%                            
Senior credit facility, Revolving credit loans [Member]                                    
Short-term Debt                                    
Short-term borrowings $ 0     $ 0 59,000,000.0                          
Long-term Debt                                    
Debt instrument, face amount $ 2,000,000,000.0     $ 2,000,000,000.0           $ 2,000,000,000.0 $ 1,500,000,000   $ 1,500,000,000          
Interest rate 0.00%     0.00%                            
LIBOR margin 1.13%     1.13%                            
Remaining borrowing capacity $ 1,749,200,000     $ 1,749,200,000                            
Letters of credit [Member]                                    
Long-term Debt                                    
Debt instrument, face amount 200,000,000.0     200,000,000.0                            
Outstanding letters of credit 11,800,000     11,800,000                            
Commercial paper [Member]                                    
Short-term Debt                                    
Short-term borrowings 238,900,000     238,900,000 $ 732,500,000                          
Long-term Debt                                    
Debt instrument, face amount $ 239,000,000.0     $ 239,000,000.0                            
Interest rate 1.90%     1.90% 3.00%