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, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	$ 2,828	$ 2,715	$ 2,482	$ 2,135	$ 2,190	$ 2,260	$ 2,828	$ 2,135	$ 2,287	$ 2,330
Total other comprehensive income / (loss)	(35)	73	104	(61)	(117)	62	142	(116)
Balance at end of period	2,828	2,715	2,482	2,135	2,190	2,260	2,828	2,135
Total
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(1,748)	(1,714)	(1,789)	(2,004)	(1,946)	(1,839)	(1,748)	(2,004)	(1,892)	(1,898)
Other comprehensive income / (loss) before reclassifications							102	(112)
Amounts reclassified from accumulated other comprehensive income							42	6
Total other comprehensive income / (loss)	(34)	75	103	(58)	(107)	59	144	(106)
Balance at end of period	(1,748)	$ (1,714)	$ (1,789)	(2,004)	$ (1,946)	$ (1,839)	(1,748)	(2,004)
Defined benefit plans
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(663)			(738)			(663)	(738)	(686)	(768)
Other comprehensive income / (loss) before reclassifications							(5)	10
Amounts reclassified from accumulated other comprehensive income							28	20
Total other comprehensive income / (loss)							23	30
Balance at end of period	(663)			(738)			(663)	(738)
Foreign currency translation
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(1,075)			(1,236)			(1,075)	(1,236)	(1,197)	(1,158)
Other comprehensive income / (loss) before reclassifications							122	(78)
Amounts reclassified from accumulated other comprehensive income							0	0
Total other comprehensive income / (loss)							122	(78)
Balance at end of period	(1,075)			(1,236)			(1,075)	(1,236)
Gains and losses on cash flow hedges
AOCI Attributable To Parent Net Of Tax [Roll Forward]
Balance at beginning of period	(10)			(30)			(10)	(30)	$ (9)	$ 28
Other comprehensive income / (loss) before reclassifications							(15)	(44)
Amounts reclassified from accumulated other comprehensive income							14	(14)
Total other comprehensive income / (loss)							(1)	(58)
Balance at end of period	$ (10)			$ (30)			$ (10)	$ (30)