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Selected Quarterly Financial Information (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 28, 2026
Feb. 28, 2025
Feb. 29, 2024
Summary of selected quarterly financial information          
Net sales $ 1,920.2 $ 2,164.2 $ 9,139.0 $ 10,208.7 $ 9,961.8
Gross profit 951.7 1,114.7 4,711.5 5,314.6 5,017.5
Net income (loss) attributable to CBI 201.8 (375.3) 1,686.7 (81.4) 1,727.4
Earnings Per Share [Abstract]          
Net income tax expense recognized for adjustments to valuation allowances (110.0) (73.3)      
Asset impairment and related expenses (42.1) (364.2)      
Net income tax benefit (expense) from the resolution of various tax examinations and assessments related to prior periods 93.4 (1.9)      
Goodwill and intangible assets impairment 0.0 (497.6)      
Unrealized net gain (loss) on securities measured at fair value 0.0 (45.4)      
Gain (loss) on sale of business $ 0.0 $ 195.0      
Class A Common Stock          
Summary of selected quarterly financial information          
Net income (loss) attributable to CBI     $ 1,686.7 $ (81.4) $ 1,727.4
Earnings Per Share [Abstract]          
Net income (loss) per common share attributable to CBI, basic (in dollars per share) $ 1.16 $ (2.09) $ 9.62 $ (0.45) $ 9.42
Net income (loss) per common share attributable to CBI, diluted (in dollars per share) $ 1.16 $ (2.09) $ 9.61 $ (0.45) $ 9.39