Condensed Combining Financial Information - Condensed Combining Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 3,046	$ 2,161	$ 5,243	$ 4,062
Cost of products sold, excluding depreciation and amortization	2,466	1,732	4,274	3,263
Depreciation and amortization	113	61	178	120
Selling and administrative expense	159	91	249	181
Restructuring and other	16	18	29	14
Income from operations	292	259	513	484
Other pension and postretirement	(17)	(12)	(34)	(24)
Loss from early extinguishment of debt	0	7	0	7
Foreign exchange	10	5	28	4
Income before income taxes	201	201	353	380
Provision for / (benefit from) income taxes	55	53	94	99
Equity earnings / (loss) in affiliates	1	0	1	0
Net income	147	148	260	281
Net income attributable to noncontrolling interests	(15)	(20)	(38)	(46)
Net income attributable to Crown Holdings	132	128	222	235
Total comprehensive income	28	242	202	515
Comprehensive income attributable to Crown Holdings	16	221	166	467
Restructuring	3	2	6	4
Crown Americas, LLC
Net sales	3,046	2,161	5,243	4,062
Cost of products sold, excluding depreciation and amortization	2,466	1,732	4,274	3,263
Depreciation and amortization	113	61	178	120
Selling and administrative expense	159	91	249	181
Restructuring and other	16	18	29	14
Income from operations	292	259	513	484
Other pension and postretirement	(17)	(12)	(34)	(24)
Loss from early extinguishment of debt		7		7
Net interest expense	98	58	166	117
Technology royalty			0	0
Foreign exchange	10	5	28	4
Income before income taxes	201	201	353	380
Provision for / (benefit from) income taxes	55	53	94	99
Equity earnings / (loss) in affiliates	1	0	1	0
Net income	147	148	260	281
Net income attributable to noncontrolling interests	(15)	(20)	(38)	(46)
Net income attributable to Crown Holdings	132	128	222	235
Total comprehensive income	28	242	202	515
Comprehensive income attributable to noncontrolling interests	(12)	(21)	(36)	(48)
Comprehensive income attributable to Crown Holdings	16	221	166	467
Crown Americas, LLC | Parent
Net sales
Cost of products sold, excluding depreciation and amortization
Depreciation and amortization
Selling and administrative expense
Restructuring and other	9		9
Income from operations	(9)		(9)
Other pension and postretirement
Net interest expense
Technology royalty
Foreign exchange
Income before income taxes	(9)		(9)
Provision for / (benefit from) income taxes	(2)		(2)
Equity earnings / (loss) in affiliates	139	128	229	235
Net income	132	128	222	235
Net income attributable to noncontrolling interests
Net income attributable to Crown Holdings	132	128	222	235
Total comprehensive income	16	221	166	467
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Crown Holdings	16	221	166	467
Crown Americas, LLC | Issuer
Net sales
Cost of products sold, excluding depreciation and amortization
Depreciation and amortization
Selling and administrative expense	3	3	5	5
Restructuring and other			3
Income from operations	(3)	(3)	(8)	(5)
Other pension and postretirement
Loss from early extinguishment of debt		6		6
Net interest expense	22	16	45	33
Technology royalty
Foreign exchange	(49)	45	7	55
Income before income taxes	24	(70)	(60)	(99)
Provision for / (benefit from) income taxes	6	(27)	(14)	(38)
Equity earnings / (loss) in affiliates	46	51	102	100
Net income	64	8	56	39
Net income attributable to noncontrolling interests
Net income attributable to Crown Holdings	64	8	56	39
Total comprehensive income	69	11	62	46
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Crown Holdings	69	11	62	46
Crown Americas, LLC | Guarantors
Net sales	975	583	1,577	1,132
Cost of products sold, excluding depreciation and amortization	834	501	1,354	976
Depreciation and amortization	32	10	43	20
Selling and administrative expense	63	35	96	68
Restructuring and other	3	1	5	2
Income from operations	43	36	79	66
Other pension and postretirement	(6)	(10)	(11)	(20)
Loss from early extinguishment of debt
Net interest expense	33	23	54	44
Technology royalty	(12)	(9)	(23)	(18)
Foreign exchange		(1)	(1)	(1)
Income before income taxes	28	33	60	61
Provision for / (benefit from) income taxes	8	12	17	20
Equity earnings / (loss) in affiliates	94	90	149	157
Net income	114	111	192	198
Net income attributable to noncontrolling interests
Net income attributable to Crown Holdings	114	111	192	198
Total comprehensive income	115	115	162	245
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Crown Holdings	115	115	162	245
Crown Americas, LLC | Non- Guarantors
Net sales	2,224	1,661	3,916	3,127
Cost of products sold, excluding depreciation and amortization	1,785	1,314	3,170	2,484
Depreciation and amortization	81	51	135	100
Selling and administrative expense	93	53	148	108
Restructuring and other	4	17	12	12
Income from operations	261	226	451	423
Other pension and postretirement	(11)	(2)	(23)	(4)
Loss from early extinguishment of debt		1		1
Net interest expense	43	19	67	40
Technology royalty	12	9	23	18
Foreign exchange	11	6	30	5
Income before income taxes	206	193	354	363
Provision for / (benefit from) income taxes	54	53	91	98
Equity earnings / (loss) in affiliates
Net income	152	140	263	265
Net income attributable to noncontrolling interests	(15)	(20)	(38)	(46)
Net income attributable to Crown Holdings	137	120	225	219
Total comprehensive income	(9)	271	205	542
Comprehensive income attributable to noncontrolling interests	(12)	(21)	(36)	(48)
Comprehensive income attributable to Crown Holdings	(21)	250	169	494
Crown Cork & Seal Company Inc.
Net sales	3,046	2,161	5,243	4,062
Cost of products sold, excluding depreciation and amortization	2,466	1,732	4,274	3,263
Depreciation and amortization	113	61	178	120
Selling and administrative expense	159	91	249	181
Restructuring and other	16	18	29	14
Income from operations	292	259	513	484
Other pension and postretirement	(17)	(12)	(34)	(24)
Loss from early extinguishment of debt		7		7
Net interest expense	98	58	166	117
Foreign exchange	10	5	28	4
Income before income taxes	201	201	353	380
Provision for / (benefit from) income taxes	55	53	94	99
Equity earnings / (loss) in affiliates	1	0	1	0
Net income	147	148	260	281
Net income attributable to noncontrolling interests	(15)	(20)	(38)	(46)
Net income attributable to Crown Holdings	132	128	222	235
Total comprehensive income	28	242	202	515
Comprehensive income attributable to noncontrolling interests	(12)	(21)	(36)	(48)
Comprehensive income attributable to Crown Holdings	16	221	166	467
Crown Cork & Seal Company Inc. | Parent
Net sales
Cost of products sold, excluding depreciation and amortization
Depreciation and amortization
Selling and administrative expense
Restructuring and other	9		9
Income from operations	(9)		(9)
Other pension and postretirement
Net interest expense
Foreign exchange
Income before income taxes	(9)		(9)
Provision for / (benefit from) income taxes	(2)		(2)
Equity earnings / (loss) in affiliates	139	128	229	235
Net income	132	128	222	235
Net income attributable to noncontrolling interests
Net income attributable to Crown Holdings	132	128	222	235
Total comprehensive income	16	221	166	467
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Crown Holdings	16	221	166	467
Crown Cork & Seal Company Inc. | Issuer
Net sales
Cost of products sold, excluding depreciation and amortization
Depreciation and amortization
Selling and administrative expense	3	2	5	4
Restructuring and other		(1)		(1)
Income from operations	(3)	(1)	(5)	(3)
Other pension and postretirement
Loss from early extinguishment of debt
Net interest expense	19	26	38	46
Foreign exchange
Income before income taxes	(22)	(27)	(43)	(49)
Provision for / (benefit from) income taxes	(5)	(8)	(9)	(18)
Equity earnings / (loss) in affiliates	131	130	226	229
Net income	114	111	192	198
Net income attributable to noncontrolling interests
Net income attributable to Crown Holdings	114	111	192	198
Total comprehensive income	115	115	162	245
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Crown Holdings	115	115	162	245
Crown Cork & Seal Company Inc. | Non- Guarantors
Net sales	3,046	2,161	5,243	4,062
Cost of products sold, excluding depreciation and amortization	2,466	1,732	4,274	3,263
Depreciation and amortization	113	61	178	120
Selling and administrative expense	156	89	244	177
Restructuring and other	7	19	20	15
Income from operations	304	260	527	487
Other pension and postretirement	(17)	(12)	(34)	(24)
Loss from early extinguishment of debt		7		7
Net interest expense	79	32	128	71
Foreign exchange	10	5	28	4
Income before income taxes	232	228	405	429
Provision for / (benefit from) income taxes	62	61	105	117
Equity earnings / (loss) in affiliates	1		1
Net income	171	167	301	312
Net income attributable to noncontrolling interests	(15)	(20)	(38)	(46)
Net income attributable to Crown Holdings	156	147	263	266
Total comprehensive income	52	261	243	546
Comprehensive income attributable to noncontrolling interests	(12)	(21)	(36)	(48)
Comprehensive income attributable to Crown Holdings	40	240	207	498
Eliminations | Crown Americas, LLC
Net sales	(153)	(83)	(250)	(197)
Cost of products sold, excluding depreciation and amortization	(153)	(83)	(250)	(197)
Depreciation and amortization
Selling and administrative expense
Restructuring and other
Other pension and postretirement
Net interest expense
Technology royalty
Foreign exchange	48	(45)	(8)	(55)
Income before income taxes	(48)	45	8	55
Provision for / (benefit from) income taxes	(11)	15	2	19
Equity earnings / (loss) in affiliates	(278)	(269)	(479)	(492)
Net income	(315)	(239)	(473)	(456)
Net income attributable to noncontrolling interests
Net income attributable to Crown Holdings	(315)	(239)	(473)	(456)
Total comprehensive income	(163)	(376)	(393)	(785)
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Crown Holdings	(163)	(376)	(393)	(785)
Eliminations | Crown Cork & Seal Company Inc.
Net sales
Cost of products sold, excluding depreciation and amortization
Depreciation and amortization
Selling and administrative expense
Restructuring and other
Other pension and postretirement
Net interest expense
Foreign exchange
Income before income taxes
Provision for / (benefit from) income taxes
Equity earnings / (loss) in affiliates	(270)	(258)	(455)	(464)
Net income	(270)	(258)	(455)	(464)
Net income attributable to noncontrolling interests
Net income attributable to Crown Holdings	(270)	(258)	(455)	(464)
Total comprehensive income	(155)	(355)	(369)	(743)
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Crown Holdings	$ (155)	(355)	$ (369)	$ (743)
Issuer [Member] | Crown Cork & Seal Company Inc.
Loss from early extinguishment of debt