Quarterly report pursuant to Section 13 or 15(d)

Business Segment Information (Details)

v3.8.0.1
Business Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Nov. 30, 2017
Nov. 30, 2017
Nov. 30, 2016
Nov. 30, 2017
Nov. 30, 2016
Feb. 28, 2017
Cost of product sold            
Net gain on undesignated commodity derivative contracts   $ 1.5 $ 0.6 $ 8.7 $ (6.0)  
Total cost of product sold   (891.6) (919.1) (2,851.0) (2,961.8)  
Selling, general and administrative expenses            
Loss on contract termination       (59.0) 0.0  
Net gain (costs) associated with the Canadian Divestiture and related activities $ (15.2)     (3.2)   $ (12.0)
Total selling, general and administrative expenses   (420.7) (357.4) (1,199.3) (1,044.1)  
Comparable Adjustments [Member]            
Cost of product sold            
Flow through of inventory step-up   (7.2) (4.9) (17.0) (16.4)  
Amortization of favorable interim supply agreement   0.0 0.0 0.0 (2.2)  
Total cost of product sold   (3.8) 7.0 (8.1) 16.1  
Selling, general and administrative expenses            
Impairment of intangible assets   0.0 0.0 (86.8) 0.0  
Loss on contract termination   (59.0) 0.0 (59.0) 0.0  
Transaction, integration and other acquisition-related costs   (4.5) (5.7) (6.8) (11.0)  
Net gain (costs) associated with the Canadian Divestiture and related activities   0.0 3.6 (3.2) (4.5)  
Other gains (losses)   4.0 (2.5) 4.0 (3.5)  
Total selling, general and administrative expenses   (59.5) (4.6) (151.8) (19.0)  
Comparable Adjustments, Operating income (loss)   (63.3) 2.4 (159.9) (2.9)  
Reduction in estimated fair value of contingent liability   8.1   8.1    
Comparable Adjustments [Member] | Commodity derivative contracts [Member]            
Cost of product sold            
Settlements of undesignated commodity derivative contracts   (0.1) 5.2 4.6 20.3  
Net gain on undesignated commodity derivative contracts   $ 3.5 $ 6.7 $ 4.3 $ 14.4