Comprehensive Income (Loss) Attributable to CBI - Reconciliation of Net Income (Loss) Attributable to CBI to Comprehensive Income (Loss) Attributable to CBI (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Aug. 31, 2025	May 31, 2025	Aug. 31, 2024	May 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net income (loss) attributable to CBI	$ 466.0		$ (1,199.0)		$ 982.1	$ (322.0)
Other comprehensive income (loss) attributable to CBI
Other comprehensive income (loss) attributable to CBI, net of tax amount	228.9	$ 364.3	(831.4)	$ (8.7)
Comprehensive income (loss) attributable to CBI	685.7		(1,993.8)		1,552.5	(1,125.8)
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss) attributable to CBI
Net gain (loss), net of tax amount					593.7
Reclassification adjustments, net of tax amount					(23.3)
Other comprehensive income (loss) attributable to CBI, before tax amount	226.4		(820.2)		592.1	(830.9)
Other comprehensive income (loss) attributable to CBI, tax (expense) benefit	(6.7)		25.4		(21.7)	27.1
Other comprehensive income (loss) attributable to CBI, net of tax amount	219.7	$ 350.7	(794.8)	$ (9.0)	570.4	(803.8)
Accumulated Other Comprehensive Income (Loss) | Share of OCI of Equity Method Investments
Other comprehensive income (loss) attributable to CBI
Net gain (loss), before tax amount	0.0		0.0		0.0	0.0
Net gain (loss), tax (expense) benefit	0.0		0.0		0.0	0.0
Net gain (loss), net of tax amount	0.0		0.0		0.0	0.0
Reclassification adjustments, before tax amount	(1.8)		0.3		(1.5)	(10.0)
Reclassification adjustments, tax (expense) benefit	0.5		(0.1)		0.4	(0.1)
Reclassification adjustments, net of tax amount	(1.3)		0.2		(1.1)	(10.1)
Other comprehensive income (loss) attributable to CBI, before tax amount	(1.8)		0.3		(1.5)	(10.0)
Other comprehensive income (loss) attributable to CBI, tax (expense) benefit	0.5		(0.1)		0.4	(0.1)
Other comprehensive income (loss) attributable to CBI, net of tax amount	(1.3)		0.2		(1.1)	(10.1)
Foreign Currency Translation Adjustments
Other comprehensive income (loss) attributable to CBI
Net gain (loss), before tax amount	164.8		(600.5)		408.3	(587.0)
Net gain (loss), tax (expense) benefit	0.0		0.0		0.0	0.0
Net gain (loss), net of tax amount	164.8		(600.5)		408.3	(587.0)
Reclassification adjustments, before tax amount	0.0		0.0		0.0	0.0
Reclassification adjustments, tax (expense) benefit	0.0		0.0		0.0	0.0
Reclassification adjustments, net of tax amount	0.0		0.0		0.0	0.0
Other comprehensive income (loss) attributable to CBI, before tax amount	164.8		(600.5)		408.3	(587.0)
Other comprehensive income (loss) attributable to CBI, tax (expense) benefit	0.0		0.0		0.0	0.0
Other comprehensive income (loss) attributable to CBI, net of tax amount	164.8		(600.5)		408.3	(587.0)
Unrealized Net Gain (Loss) on Cash Flow Hedge
Other comprehensive income (loss) attributable to CBI
Net gain (loss), before tax amount	85.4		(185.7)		216.0	(157.5)
Net gain (loss), tax (expense) benefit	(10.2)		21.6		(26.3)	18.3
Net gain (loss), net of tax amount	75.2		(164.1)		189.7	(139.2)
Reclassification adjustments, before tax amount	(19.3)		(34.8)		(25.0)	(76.9)
Reclassification adjustments, tax (expense) benefit	2.3		4.1		2.8	9.1
Reclassification adjustments, net of tax amount	(17.0)		(30.7)		(22.2)	(67.8)
Other comprehensive income (loss) attributable to CBI, before tax amount	66.1		(220.5)		191.0	(234.4)
Other comprehensive income (loss) attributable to CBI, tax (expense) benefit	(7.9)		25.7		(23.5)	27.4
Other comprehensive income (loss) attributable to CBI, net of tax amount	58.2		(194.8)		167.5	(207.0)
Unrealized Net Gain (Loss) on Net Investment Hedges
Other comprehensive income (loss) attributable to CBI
Net gain (loss), before tax amount	(2.6)				(5.6)
Net gain (loss), tax (expense) benefit	0.7				1.4
Net gain (loss), net of tax amount	(1.9)				(4.2)
Reclassification adjustments, before tax amount	0.0				0.0
Reclassification adjustments, tax (expense) benefit	0.0				0.0
Reclassification adjustments, net of tax amount	0.0				0.0
Other comprehensive income (loss) attributable to CBI, before tax amount	(2.6)				(5.6)
Other comprehensive income (loss) attributable to CBI, tax (expense) benefit	0.7				1.4
Other comprehensive income (loss) attributable to CBI, net of tax amount	(1.9)				(4.2)
Pension/ Postretirement Adjustments
Other comprehensive income (loss) attributable to CBI
Net gain (loss), before tax amount	(0.1)		0.5		(0.1)	0.5
Net gain (loss), tax (expense) benefit	0.0		(0.2)		0.0	(0.2)
Net gain (loss), net of tax amount	(0.1)		0.3		(0.1)	0.3
Reclassification adjustments, before tax amount	0.0		0.0		0.0	0.0
Reclassification adjustments, tax (expense) benefit	0.0		0.0		0.0	0.0
Reclassification adjustments, net of tax amount	0.0		0.0		0.0	0.0
Other comprehensive income (loss) attributable to CBI, before tax amount	(0.1)		0.5		(0.1)	0.5
Other comprehensive income (loss) attributable to CBI, tax (expense) benefit	0.0		(0.2)		0.0	(0.2)
Other comprehensive income (loss) attributable to CBI, net of tax amount	$ (0.1)		$ 0.3		$ (0.1)	$ 0.3