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Accumulated Other Comprehensive Loss Attributable to Crown Holdings (Schedule of AOCI) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Increase (Decrease) in AOCI [Roll Forward]    
Balance at beginning of period $ 2,604 $ 2,092
Other comprehensive (loss) / income before reclassifications (300) (199)
Amounts reclassified from accumulated other comprehensive income 1,595 137
Other comprehensive income / (loss) 1,295 (62)
Balance at end of period 2,330 2,604
Defined benefit plans    
Increase (Decrease) in AOCI [Roll Forward]    
Balance at beginning of period (1,464) (1,449)
Other comprehensive (loss) / income before reclassifications (419) (117)
Amounts reclassified from accumulated other comprehensive income 1,115 102
Other comprehensive income / (loss) 696 (15)
Balance at end of period (768) (1,464)
Foreign currency translation    
Increase (Decrease) in AOCI [Roll Forward]    
Balance at beginning of period (1,759) (1,668)
Other comprehensive (loss) / income before reclassifications 48 (91)
Amounts reclassified from accumulated other comprehensive income 553 0
Other comprehensive income / (loss) 601 (91)
Balance at end of period (1,158) (1,759)
Gains and losses on cash flow hedges    
Increase (Decrease) in AOCI [Roll Forward]    
Balance at beginning of period 30 (14)
Other comprehensive (loss) / income before reclassifications 71 9
Amounts reclassified from accumulated other comprehensive income (73) 35
Other comprehensive income / (loss) (2) 44
Balance at end of period 28 30
Accumulated Other Comprehensive Loss    
Increase (Decrease) in AOCI [Roll Forward]    
Balance at beginning of period (3,193) (3,131)
Balance at end of period $ (1,898) $ (3,193)