Quarterly report pursuant to Section 13 or 15(d)

Goodwill (Details)

v3.10.0.1
Goodwill (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Aug. 31, 2018
Feb. 28, 2018
Changes in the carrying amount of goodwill [Roll Forward]    
Goodwill, beginning of period $ 8,083.1 $ 7,920.5
Purchase accounting allocations 20.2 120.1
Foreign currency translation adjustments (20.7) 42.5
Goodwill, end of period 8,082.6 8,083.1
Operating Segments [Member] | Beer [Member]    
Changes in the carrying amount of goodwill [Roll Forward]    
Goodwill, beginning of period 5,157.6 5,053.0
Purchase accounting allocations 19.7 63.9
Foreign currency translation adjustments (10.8) 40.7
Goodwill, end of period 5,166.5 5,157.6
Operating Segments [Member] | Beer [Member] | Obregon Brewery [Member]    
Changes in the carrying amount of goodwill [Roll Forward]    
Purchase accounting allocations   13.8
Operating Segments [Member] | Wine and Spirits [Member]    
Changes in the carrying amount of goodwill [Roll Forward]    
Goodwill, beginning of period 2,925.5 2,867.5
Purchase accounting allocations   56.2
Foreign currency translation adjustments (9.9) 1.8
Goodwill, end of period 2,916.1 $ 2,925.5
Purchase accounting allocations, adjustments $ 0.5