Acquisitions, Divestitures, and Business Transformation - Summary of Gain Recognized in Connection with Divestiture (Details) - Black Velvet Divestiture - Disposal Group, Not Discontinued Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended		10 Months Ended	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Feb. 29, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from buyer					$ 269.7
AOCI reclassification adjustments, primarily foreign currency translation					20.9
Direct costs to sell					(3.8)
Gain (loss) on sale of business	$ (3.0)	$ 0.0	$ (3.6)	$ 0.0	70.5	$ 74.1
Working capital adjustments to be paid					(3.0)
Operating Segments | Wine and Spirits
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net assets sold					$ (213.3)