Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,031.8	$ 21.4	$ 3,459.1
Foreign currency translation adjustments	(56.0)	60.8	(196.8)
Unrealized gain (loss) on cash flow hedges	(20.9)	40.4	11.4
Unrealized gain (loss) on available-for-sale debt securities	0.0	0.0	2.5
Pension/postretirement adjustments	(1.6)	(0.6)	0.5
Share of other comprehensive income (loss) of equity method investments	(1.8)	(10.1)	29.6
Other comprehensive income (loss) attributable to CBI, Net of Tax Amount	(80.3)	90.5	(152.8)
Comprehensive income (loss)	1,951.5	111.9	3,306.3
Comprehensive (income) loss, attributable to noncontrolling interests	(22.7)	(36.1)	(21.4)
Comprehensive income attributable to CBI	$ 1,928.8	$ 75.8	$ 3,284.9