Condensed Combining Financial Information - Condensed Combining Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 298		$ 424	$ 374	$ 559
Receivables, net	1,968	$ 1,195	1,041
Inventories	1,639	1,241	1,385
Prepaid expenses and other current assets	193	250	224
Total current assets	4,098	3,110	3,074
Goodwill	4,495		3,046
Intangible assets, net	2,258		472
Property, plant and equipment, net	3,722		3,239
Other non-current assets	762	833	832
Total	15,335	10,700	10,663
Short-term debt	53		62
Current maturities of long-term debt	89		64
Accounts payable	2,507		2,367
Accrued liabilities	952	774	757
Total current liabilities	3,601	3,267	3,250
Long-term debt, excluding current maturities	8,928		5,217
Postretirement and pension liabilities	616		588
Other non-current liabilities	880	695	685
Commitments and contingent liabilities
Noncontrolling interests	369	323	322
Crown Holdings shareholders’ equity/(deficit)	941	610	601
Total equity/(deficit)	1,310	933	923	$ 1,112	$ 668
Total	15,335	$ 10,700	10,663
Crown Americas, LLC
Cash and cash equivalents	298		424
Receivables, net	1,968		1,041
Intercompany receivables			0
Inventories	1,639		1,385
Prepaid expenses and other current assets	193		224
Total current assets	4,098		3,074
Intercompany debt receivables			0
Investments			0
Goodwill	4,495		3,046
Intangible assets, net	2,258		472
Property, plant and equipment, net	3,722		3,239
Other non-current assets	762		832
Total	15,335		10,663
Short-term debt	53		62
Current maturities of long-term debt	89		64
Accounts payable	2,507		2,367
Accrued liabilities	952		757
Total current liabilities	3,601		3,250
Long-term debt, excluding current maturities	8,928		5,217
Long-term intercompany debt			0
Postretirement and pension liabilities	616		588
Other non-current liabilities	880		685
Commitments and contingent liabilities
Noncontrolling interests	369		322
Crown Holdings shareholders’ equity/(deficit)	941		601
Total equity/(deficit)	1,310		923
Total	15,335		10,663
Crown Americas, LLC | Parent
Cash and cash equivalents
Receivables, net
Intercompany receivables
Inventories
Prepaid expenses and other current assets	1
Total current assets	1
Intercompany debt receivables
Investments	3,471		3,120
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	3,472		3,120
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities	16		22
Intercompany payables
Total current liabilities	16		22
Long-term debt, excluding current maturities
Long-term intercompany debt	2,515		2,497
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	941		601
Total equity/(deficit)	941		601
Total	3,472		3,120
Crown Americas, LLC | Issuer
Cash and cash equivalents	24		36
Receivables, net	4
Intercompany receivables
Inventories
Prepaid expenses and other current assets	1		2
Total current assets	29		38
Intercompany debt receivables	2,703		2,523
Investments	2,726		2,479
Goodwill
Intangible assets, net
Property, plant and equipment, net	1		1
Other non-current assets	23		11
Total	5,482		5,052
Short-term debt
Current maturities of long-term debt	32		23
Accounts payable
Accrued liabilities	30		31
Intercompany payables
Total current liabilities	62		54
Long-term debt, excluding current maturities	3,048		2,094
Long-term intercompany debt	795		1,411
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	1,577		1,493
Total equity/(deficit)	1,577		1,493
Total	5,482		5,052
Crown Americas, LLC | Guarantors
Cash and cash equivalents	4		3
Receivables, net	206		29
Intercompany receivables	47		32
Inventories	446		347
Prepaid expenses and other current assets	16		17
Total current assets	719		428
Intercompany debt receivables	3,812		3,325
Investments	1,177		1,032
Goodwill	1,182		453
Intangible assets, net	917		13
Property, plant and equipment, net	695		515
Other non-current assets	209		311
Total	8,711		6,077
Short-term debt
Current maturities of long-term debt	14		3
Accounts payable	681		547
Accrued liabilities	162		72
Intercompany payables	23		13
Total current liabilities	880		635
Long-term debt, excluding current maturities	1,534		408
Long-term intercompany debt	2,856		2,454
Postretirement and pension liabilities	350		373
Other non-current liabilities	339		338
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	2,752		1,869
Total equity/(deficit)	2,752		1,869
Total	8,711		6,077
Crown Americas, LLC | Non- Guarantors
Cash and cash equivalents	270		385
Receivables, net	1,758		1,012
Intercompany receivables	23		13
Inventories	1,193		1,038
Prepaid expenses and other current assets	175		205
Total current assets	3,419		2,653
Intercompany debt receivables	153		732
Investments
Goodwill	3,313		2,593
Intangible assets, net	1,341		459
Property, plant and equipment, net	3,026		2,723
Other non-current assets	530		510
Total	11,782		9,670
Short-term debt	53		62
Current maturities of long-term debt	43		38
Accounts payable	1,826		1,820
Accrued liabilities	744		632
Intercompany payables	47		32
Total current liabilities	2,713		2,584
Long-term debt, excluding current maturities	4,346		2,715
Long-term intercompany debt	502		218
Postretirement and pension liabilities	266		215
Other non-current liabilities	541		347
Commitments and contingent liabilities
Noncontrolling interests	369		322
Crown Holdings shareholders’ equity/(deficit)	3,045		3,269
Total equity/(deficit)	3,414		3,591
Total	11,782		9,670
Crown Cork & Seal Company Inc.
Cash and cash equivalents	298		424
Receivables, net	1,968		1,041
Inventories	1,639		1,385
Prepaid expenses and other current assets	193		224
Total current assets	4,098		3,074
Goodwill	4,495		3,046
Intangible assets, net	2,258		472
Property, plant and equipment, net	3,722		3,239
Other non-current assets	762		832
Total	15,335		10,663
Short-term debt	53		62
Current maturities of long-term debt	89		64
Accounts payable	2,507		2,367
Accrued liabilities	952		757
Total current liabilities	3,601		3,250
Long-term debt, excluding current maturities	8,928		5,217
Long-term intercompany debt	0
Postretirement and pension liabilities	616		588
Other non-current liabilities	880		685
Commitments and contingent liabilities
Noncontrolling interests	369		322
Crown Holdings shareholders’ equity/(deficit)	941		601
Total equity/(deficit)	1,310		923
Total	15,335		10,663
Crown Cork & Seal Company Inc. | Parent
Cash and cash equivalents
Receivables, net
Inventories
Prepaid expenses and other current assets	1
Total current assets	1
Intercompany debt receivables
Investments	3,471		3,120
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	3,472		3,120
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities	16		22
Total current liabilities	16		22
Long-term debt, excluding current maturities
Long-term intercompany debt	2,515		2,497
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	941		601
Total equity/(deficit)	941		601
Total	3,472		3,120
Crown Cork & Seal Company Inc. | Issuer
Cash and cash equivalents
Receivables, net	9		9
Inventories
Prepaid expenses and other current assets	1
Total current assets	10		9
Intercompany debt receivables
Investments	3,729		3,448
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets	178		283
Total	3,917		3,740
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities	39		41
Total current liabilities	39		41
Long-term debt, excluding current maturities	387		387
Long-term intercompany debt	1,058		1,107
Postretirement and pension liabilities
Other non-current liabilities	331		336
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	2,102		1,869
Total equity/(deficit)	2,102		1,869
Total	3,917		3,740
Crown Cork & Seal Company Inc. | Non- Guarantors
Cash and cash equivalents	298		424
Receivables, net	1,959		1,032
Inventories	1,639		1,385
Prepaid expenses and other current assets	191		224
Total current assets	4,087		3,065
Intercompany debt receivables	3,573		3,604
Investments
Goodwill	4,495		3,046
Intangible assets, net	2,258		472
Property, plant and equipment, net	3,722		3,239
Other non-current assets	584		549
Total	18,719		13,975
Short-term debt	53		62
Current maturities of long-term debt	89		64
Accounts payable	2,507		2,367
Accrued liabilities	897		694
Total current liabilities	3,546		3,187
Long-term debt, excluding current maturities	8,541		4,830
Long-term intercompany debt
Postretirement and pension liabilities	616		588
Other non-current liabilities	549		349
Commitments and contingent liabilities
Noncontrolling interests	369		322
Crown Holdings shareholders’ equity/(deficit)	5,098		4,699
Total equity/(deficit)	5,467		5,021
Total	18,719		13,975
Eliminations | Crown Americas, LLC
Cash and cash equivalents
Receivables, net
Intercompany receivables	(70)		(45)
Inventories
Prepaid expenses and other current assets
Total current assets	(70)		(45)
Intercompany debt receivables	(6,668)		(6,580)
Investments	(7,374)		(6,631)
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	(14,112)		(13,256)
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities
Intercompany payables	(70)		(45)
Total current liabilities	(70)		(45)
Long-term debt, excluding current maturities
Long-term intercompany debt	(6,668)		(6,580)
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	(7,374)		(6,631)
Total equity/(deficit)	(7,374)		(6,631)
Total	(14,112)		(13,256)
Eliminations | Crown Cork & Seal Company Inc.
Cash and cash equivalents
Receivables, net
Inventories
Prepaid expenses and other current assets
Intercompany debt receivables	(3,573)		(3,604)
Investments	(7,200)		(6,568)
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	(10,773)		(10,172)
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities
Long-term debt, excluding current maturities
Long-term intercompany debt	(3,573)		(3,604)
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	(7,200)		(6,568)
Total equity/(deficit)	(7,200)		(6,568)
Total	$ (10,773)		$ (10,172)