Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Narrative (Details)

v3.20.4
Borrowings - Narrative (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jan. 07, 2021
Aug. 31, 2020
Apr. 30, 2020
Nov. 30, 2020
Aug. 31, 2020
May 31, 2020
Nov. 30, 2019
Aug. 31, 2019
May 31, 2019
Nov. 30, 2020
Nov. 30, 2019
Mar. 31, 2020
Feb. 29, 2020
Oct. 31, 2018
Nov. 30, 2017
May 31, 2013
Schedule of Debt [Line Items]                                
Debt instrument, face amount                       $ 2,000,000,000.0        
Short-term borrowings       $ 40,000,000.0           $ 40,000,000.0     $ 238,900,000      
Other comprehensive income (loss), net of income tax effect       484,100,000 $ 211,400,000 $ (792,300,000) $ 100,100,000 $ (129,400,000) $ (2,700,000)              
Unamortized debt issuance costs, long-term debt obligations       63,100,000           63,100,000            
Unamortized discount, long-term debt obligations       17,400,000           17,400,000            
Net unrealized gain (loss) on derivative instruments                                
Schedule of Debt [Line Items]                                
Other comprehensive income (loss), net of income tax effect     $ (21,800,000) 129,900,000     $ 53,900,000     (4,200,000) $ 12,700,000          
Derivative instruments designated as hedging instruments | Treasury lock contracts                                
Schedule of Debt [Line Items]                                
Aggregate notional value of derivative instruments       0           0   $ 500,000,000.0 300,000,000.0      
Average fixed interest rate, interest rate swap contracts                       1.20%        
Commercial paper                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount                           $ 2,000,000,000.0    
Short-term borrowings       $ 40,000,000.0           $ 40,000,000.0     $ 238,900,000      
Interest rate       0.40%           0.40%            
Term Credit Agreement | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount                       $ 1,500,000,000        
Three-Year Term Facility | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount                       500,000,000.0        
Five-Year Term Facility | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount                       1,000,000,000.0        
2019 Five-Year Term Facility | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount       $ 491,300,000           $ 491,300,000   $ 491,300,000        
Interest rate       1.00%           1.00%            
April 2020 Senior Notes | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount     $ 1,200,000,000.0                          
Proceeds from issuance of long-term debt, net of discount and debt issuance costs   $ 1,183,300,000                            
2.25% November 2017 Senior Notes | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount                             $ 700,000,000.0  
Coupon rates of notes                             2.25%  
Percentage of outstanding principal amount redeemed           100.00%                    
Make-whole payment           $ 6,200,000                    
October 2018 Senior Floating Rate Notes | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount                           $ 650,000,000.0    
Percentage of outstanding principal amount redeemed       100.00%                        
May 2013 Eight Year Senior Notes | Unsecured debt                                
Schedule of Debt [Line Items]                                
Debt instrument, face amount                               $ 500,000,000.0
Coupon rates of notes                               3.75%
May 2013 Eight Year Senior Notes | Unsecured debt | Subsequent event                                
Schedule of Debt [Line Items]                                
Percentage of outstanding principal amount redeemed 100.00%                              
Make-whole payment $ 4,000,000