Constellation Brands, Inc. Annual report pursuant to Section 13 and 15(d)

Goodwill (Details) $ in Millions, $ in Millions	12 Months Ended
Goodwill (Details) $ in Millions, $ in Millions	Feb. 28, 2018 USD ($)	Feb. 28, 2017 USD ($)	Dec. 16, 2016 USD ($)	Dec. 16, 2016 CAD ($)
Changes in the Carrying Amount of Goodwill [Rollforward]
Goodwill, beginning of period	$ 7,920.5	$ 7,138.6
Purchase accounting allocations	120.1	884.5
Canadian Divestiture		(126.1)
Foreign currency translation adjustments	42.5	23.5
Goodwill, end of period	8,083.1	7,920.5
Operating Segments [Member] \| Beer [Member]
Changes in the Carrying Amount of Goodwill [Rollforward]
Goodwill, beginning of period	5,053.0	4,530.1
Purchase accounting allocations	63.9	510.8
Canadian Divestiture		0.0
Foreign currency translation adjustments	40.7	12.1
Goodwill, end of period	5,157.6	5,053.0
Operating Segments [Member] \| Beer [Member] \| Obregon Brewery [Member]
Changes in the Carrying Amount of Goodwill [Rollforward]
Purchase accounting allocations	13.8
Operating Segments [Member] \| Wine and Spirits [Member]
Changes in the Carrying Amount of Goodwill [Rollforward]
Goodwill, beginning of period	2,867.5	2,608.5
Purchase accounting allocations	56.2	373.7
Canadian Divestiture		(126.1)
Foreign currency translation adjustments	1.8	11.4
Goodwill, end of period	$ 2,925.5	$ 2,867.5
Accumulated impairment losses			$ 216.8	$ 289.1