Net Income (Loss) Per Common Share Attributable to CBI (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Earnings per share reconciliation
Net income (loss) attributable to CBI	$ 466.0	$ (1,199.0)	$ 982.1	$ (322.0)
Basic and diluted net income (loss) per common share attributable to CBI
Weighted average shares outstanding from calculation of diluted net income (loss) per share (in shares)		539		604
Class A Stock
Earnings per share reconciliation
Net income (loss) attributable to CBI	$ 466.0	$ (1,199.0)	$ 982.1	$ (322.0)
Weighted average number of shares outstanding reconciliation
Weighted average common shares outstanding - basic (in shares)	175,821	181,947	176,804	182,356
Stock-based awards, primarily stock options (in shares)	117	0	153	0
Weighted average common shares outstanding - diluted (in shares)	175,938	181,947	176,957	182,356
Basic and diluted net income (loss) per common share attributable to CBI
Net income (loss) per common share attributable to CBI - basic (in dollars per share)	$ 2.65	$ (6.59)	$ 5.55	$ (1.77)
Net income (loss) per common share attributable to CBI - diluted (in dollars per share)	$ 2.65	$ (6.59)	$ 5.55	$ (1.77)