Accumulated Other Comprehensive Loss Attributable to Crown Holdings - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	$ 3,045	$ 2,977	$ 2,932	$ 2,828	$ 2,715	$ 2,482	$ 3,045	$ 2,828	$ 2,864	$ 2,287
Total other comprehensive income (loss)	333	(114)	13	(35)	73	104	232	142
Balance at end of period	3,045	2,977	2,932	2,828	2,715	2,482	3,045	2,828
Total
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(1,457)	(1,785)	(1,671)	(1,748)	(1,714)	(1,789)	(1,457)	(1,748)	(1,687)	(1,892)
Other comprehensive income / (loss) before reclassifications							(196)	102
Amounts reclassified from accumulated other comprehensive income							426	42
Total other comprehensive income (loss)	328	(114)	16	(34)	75	103	230	144
Balance at end of period	(1,457)	$ (1,785)	$ (1,671)	(1,748)	$ (1,714)	$ (1,789)	(1,457)	(1,748)
Defined benefit plans
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(247)			(663)			(247)	(663)	(664)	(686)
Other comprehensive income / (loss) before reclassifications							1	(5)
Amounts reclassified from accumulated other comprehensive income							416	28
Total other comprehensive income (loss)							417	23
Balance at end of period	(247)			(663)			(247)	(663)
Foreign currency translation
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(1,212)			(1,075)			(1,212)	(1,075)	(1,022)	(1,197)
Other comprehensive income / (loss) before reclassifications							(190)	122
Amounts reclassified from accumulated other comprehensive income							0	0
Total other comprehensive income (loss)							(190)	122
Balance at end of period	(1,212)			(1,075)			(1,212)	(1,075)
Gains and losses on cash flow hedges
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	2			(10)			2	(10)	$ (1)	$ (9)
Other comprehensive income / (loss) before reclassifications							(7)	(15)
Amounts reclassified from accumulated other comprehensive income							10	14
Total other comprehensive income (loss)							3	(1)
Balance at end of period	$ 2			$ (10)			$ 2	$ (10)