Accumulated Other Comprehensive Loss Attributable to Crown Holdings - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	$ 2,977	$ 2,932	$ 2,715	$ 2,482	$ 2,977	$ 2,715	$ 2,864	$ 2,287
Total other comprehensive income	(114)	13	73	104	(101)	177
Balance at end of period	2,977	2,932	2,715	2,482	2,977	2,715
Total
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(1,785)	(1,671)	(1,714)	(1,789)	(1,785)	(1,714)	(1,687)	(1,892)
Other comprehensive income / (loss) before reclassifications					(124)	153
Amounts reclassified from accumulated other comprehensive income					26	25
Total other comprehensive income	(114)	16	75	103	(98)	178
Balance at end of period	(1,785)	$ (1,671)	(1,714)	$ (1,789)	(1,785)	(1,714)
Defined benefit plans
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(644)		(667)		(644)	(667)	(664)	(686)
Other comprehensive income / (loss) before reclassifications					0	0
Amounts reclassified from accumulated other comprehensive income					20	19
Total other comprehensive income					20	19
Balance at end of period	(644)		(667)		(644)	(667)
Foreign currency translation
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(1,149)		(1,030)		(1,149)	(1,030)	(1,022)	(1,197)
Other comprehensive income / (loss) before reclassifications					(127)	167
Amounts reclassified from accumulated other comprehensive income					0	0
Total other comprehensive income					(127)	167
Balance at end of period	(1,149)		(1,030)		(1,149)	(1,030)
Gains and losses on cash flow hedges
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	8		(17)		8	(17)	$ (1)	$ (9)
Other comprehensive income / (loss) before reclassifications					3	(14)
Amounts reclassified from accumulated other comprehensive income					6	6
Total other comprehensive income					9	(8)
Balance at end of period	$ 8		$ (17)		$ 8	$ (17)