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Quarterly Data (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Quarterly Financial Data [Line Items]
Net Sales	$ 2,791	$ 3,084	$ 3,035	$ 2,755	$ 2,734	$ 3,174	$ 3,046	$ 2,197	$ 11,665	$ 11,151	$ 8,698
Gross profit	400	508	495	423	390	517	467	324
Operating Income (Loss)	199	352	383	262	218	365	292	221	1,196	1,096	1,024
Net income (loss) attributable to Crown Holdings	$ 87	$ 183	$ 137	$ 103	$ 53	$ 164	$ 132	$ 90	$ 510	$ 439	$ 323
Earnings per average common share:
Basic (in dollars per share)	$ 0.65	$ 1.37	$ 1.02	$ 0.77	$ 0.40	$ 1.23	$ 0.99	$ 0.67	$ 3.81	$ 3.28	$ 2.39
Diluted (in dollars per share)	$ 0.64	$ 1.36	$ 1.02	$ 0.77	$ 0.40	$ 1.23	$ 0.99	$ 0.67	$ 3.78	$ 3.28	$ 2.38
Average common shares outstanding:
Basic (in shares)	134,000	133,900	133,900	133,800	133,700	133,700	133,600	133,500	133,890	133,640	135,290
Diluted (in shares)	135,200	135,000	134,800	134,400	134,100	133,800	133,800	133,800	134,880	133,880	135,610
Restructuring charges (benefit)	$ 15		$ 45	$ 4	$ 16	$ 1	$ 16	$ 13
Loss from early extinguishments of debt				(6)					$ 27	$ 0	$ 7
Curtailments				$ 14
Pension and postretirement gain (loss)	7	$ 6	31		$ 42
Income tax (benefit) expense	37		$ 15			$ 28			166	216	401
Goodwill impairment	$ 25								25	0	0
Transaction costs								$ 24	0	26	2
Fair value adjustment to inventory							$ 40		0	40	0
Pension Plan | Non-U.S. Plans
Average common shares outstanding:
Curtailments									(18)	0
Pension and postretirement gain (loss)									(38)	(45)	(42)
Other Postretirement Benefits
Average common shares outstanding:
Pension and postretirement gain (loss)									$ (3)	$ (4)	(4)
Signode
Average common shares outstanding:
Fair value adjustment to inventory											$ (32)

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