Condensed Combining Financial Information - Condensed Combining Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 2,201		$ 424	$ 338	$ 559
Receivables, net	1,386	$ 1,195	1,041
Inventories	1,431	1,241	1,385
Prepaid expenses and other current assets	243	250	224
Total current assets	5,261	3,110	3,074
Goodwill	3,134		3,046
Intangible assets, net	487		472
Property, plant and equipment, net	3,322		3,239
Other non-current assets	875	833	832
Total	13,079	10,700	10,663
Short-term debt	32		62
Current maturities of long-term debt	61		64
Accounts payable	2,009		2,367
Accrued liabilities	759	774
Total current liabilities	2,861	3,267	3,250
Long-term debt, excluding current maturities	7,778		5,217
Postretirement and pension liabilities	584		588
Other non-current liabilities	744	695	685
Commitments and contingent liabilities
Noncontrolling interests	347	323	322
Crown Holdings shareholders’ equity/(deficit)	765	610	601
Total equity/(deficit)	1,112	933	923	$ 859	$ 668
Total	13,079	$ 10,700	10,663
Crown Americas, LLC
Cash and cash equivalents	2,201		424
Receivables, net	1,386		1,041
Intercompany receivables			0
Inventories	1,431		1,385
Prepaid expenses and other current assets	243		224
Total current assets	5,261		3,074
Intercompany debt receivables			0
Investments			0
Goodwill	3,134		3,046
Intangible assets, net	487		472
Property, plant and equipment, net	3,322		3,239
Other non-current assets	875		832
Total	13,079		10,663
Short-term debt	32		62
Current maturities of long-term debt	61		64
Accounts payable	2,009		2,367
Accrued liabilities	759		757
Total current liabilities	2,861		3,250
Long-term debt, excluding current maturities	7,778		5,217
Long-term intercompany debt			0
Postretirement and pension liabilities	584		588
Other non-current liabilities	744		685
Commitments and contingent liabilities
Noncontrolling interests	347		322
Crown Holdings shareholders’ equity/(deficit)	765		601
Total equity/(deficit)	1,112		923
Total	13,079		10,663
Crown Americas, LLC | Parent
Cash and cash equivalents
Receivables, net
Intercompany receivables
Inventories
Prepaid expenses and other current assets	2
Total current assets	2
Intercompany debt receivables
Investments	3,296		3,120
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	3,298		3,120
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities	13		22
Intercompany payables
Total current liabilities	13		22
Long-term debt, excluding current maturities
Long-term intercompany debt	2,520		2,497
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	765		601
Total equity/(deficit)	765		601
Total	3,298		3,120
Crown Americas, LLC | Issuer
Cash and cash equivalents	676		36
Receivables, net	3
Intercompany receivables
Inventories
Prepaid expenses and other current assets	2		2
Total current assets	681		38
Intercompany debt receivables	2,931		2,523
Investments	2,537		2,479
Goodwill
Intangible assets, net
Property, plant and equipment, net	1		1
Other non-current assets	11		11
Total	6,161		5,052
Short-term debt
Current maturities of long-term debt	23		23
Accounts payable
Accrued liabilities	32		31
Intercompany payables
Total current liabilities	55		54
Long-term debt, excluding current maturities	3,113		2,094
Long-term intercompany debt	1,470		1,411
Postretirement and pension liabilities
Other non-current liabilities	37
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	1,486		1,493
Total equity/(deficit)	1,486		1,493
Total	6,161		5,052
Crown Americas, LLC | Guarantors
Cash and cash equivalents	2		3
Receivables, net	78		29
Intercompany receivables	28		32
Inventories	350		347
Prepaid expenses and other current assets	15		17
Total current assets	473		428
Intercompany debt receivables	3,708		3,325
Investments	1,041		1,032
Goodwill	453		453
Intangible assets, net	13		13
Property, plant and equipment, net	524		515
Other non-current assets	331		311
Total	6,543		6,077
Short-term debt
Current maturities of long-term debt	3		3
Accounts payable	502		547
Accrued liabilities	85		72
Intercompany payables	10		13
Total current liabilities	600		635
Long-term debt, excluding current maturities	407		408
Long-term intercompany debt	2,912		2,454
Postretirement and pension liabilities	368		373
Other non-current liabilities	333		338
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	1,923		1,869
Total equity/(deficit)	1,923		1,869
Total	6,543		6,077
Crown Americas, LLC | Non- Guarantors
Cash and cash equivalents	1,523		385
Receivables, net	1,305		1,012
Intercompany receivables	10		13
Inventories	1,081		1,038
Prepaid expenses and other current assets	224		205
Total current assets	4,143		2,653
Intercompany debt receivables	778		732
Investments
Goodwill	2,681		2,593
Intangible assets, net	474		459
Property, plant and equipment, net	2,797		2,723
Other non-current assets	533		510
Total	11,406		9,670
Short-term debt	32		62
Current maturities of long-term debt	35		38
Accounts payable	1,507		1,820
Accrued liabilities	629		632
Intercompany payables	28		32
Total current liabilities	2,231		2,584
Long-term debt, excluding current maturities	4,258		2,715
Long-term intercompany debt	515		218
Postretirement and pension liabilities	216		215
Other non-current liabilities	374		347
Commitments and contingent liabilities
Noncontrolling interests	347		322
Crown Holdings shareholders’ equity/(deficit)	3,465		3,269
Total equity/(deficit)	3,812		3,591
Total	11,406		9,670
Crown Cork & Seal Company Inc.
Cash and cash equivalents	2,201		424
Receivables, net	1,386		1,041
Inventories	1,431		1,385
Prepaid expenses and other current assets	243		224
Total current assets	5,261		3,074
Goodwill	3,134		3,046
Intangible assets, net	487		472
Property, plant and equipment, net	3,322		3,239
Other non-current assets	875		832
Total	13,079		10,663
Short-term debt	32		62
Current maturities of long-term debt	61		64
Accounts payable	2,009		2,367
Accrued liabilities	759		757
Total current liabilities	2,861		3,250
Long-term debt, excluding current maturities	7,778		5,217
Long-term intercompany debt	0
Postretirement and pension liabilities	584		588
Other non-current liabilities	744		685
Commitments and contingent liabilities
Noncontrolling interests	347		322
Crown Holdings shareholders’ equity/(deficit)	765		601
Total equity/(deficit)	1,112		923
Total	13,079		10,663
Crown Cork & Seal Company Inc. | Parent
Cash and cash equivalents
Receivables, net
Inventories
Prepaid expenses and other current assets	2
Total current assets	2
Intercompany debt receivables
Investments	3,296		3,120
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	3,298		3,120
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities	13		22
Total current liabilities	13		22
Long-term debt, excluding current maturities
Long-term intercompany debt	2,520		2,497
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	765		601
Total equity/(deficit)	765		601
Total	3,298		3,120
Crown Cork & Seal Company Inc. | Issuer
Cash and cash equivalents
Receivables, net	9		9
Inventories
Prepaid expenses and other current assets
Total current assets	9		9
Intercompany debt receivables
Investments	3,519		3,448
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets	285		283
Total	3,813		3,740
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities	40		41
Total current liabilities	40		41
Long-term debt, excluding current maturities	387		387
Long-term intercompany debt	1,128		1,107
Postretirement and pension liabilities
Other non-current liabilities	335		336
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	1,923		1,869
Total equity/(deficit)	1,923		1,869
Total	3,813		3,740
Crown Cork & Seal Company Inc. | Non- Guarantors
Cash and cash equivalents	2,201		424
Receivables, net	1,377		1,032
Inventories	1,431		1,385
Prepaid expenses and other current assets	241		224
Total current assets	5,250		3,065
Intercompany debt receivables	3,648		3,604
Investments
Goodwill	3,134		3,046
Intangible assets, net	487		472
Property, plant and equipment, net	3,322		3,239
Other non-current assets	590		549
Total	16,431		13,975
Short-term debt	32		62
Current maturities of long-term debt	61		64
Accounts payable	2,009		2,367
Accrued liabilities	706		694
Total current liabilities	2,808		3,187
Long-term debt, excluding current maturities	7,391		4,830
Long-term intercompany debt
Postretirement and pension liabilities	584		588
Other non-current liabilities	409		349
Commitments and contingent liabilities
Noncontrolling interests	347		322
Crown Holdings shareholders’ equity/(deficit)	4,892		4,699
Total equity/(deficit)	5,239		5,021
Total	16,431		13,975
Eliminations | Crown Americas, LLC
Cash and cash equivalents
Receivables, net
Intercompany receivables	(38)		(45)
Inventories
Prepaid expenses and other current assets
Total current assets	(38)		(45)
Intercompany debt receivables	(7,417)		(6,580)
Investments	(6,874)		(6,631)
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	(14,329)		(13,256)
Short-term debt
Current maturities of long-term debt
Accounts payable
Accrued liabilities
Intercompany payables	(38)		(45)
Total current liabilities	(38)		(45)
Long-term debt, excluding current maturities
Long-term intercompany debt	(7,417)		(6,580)
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	(6,874)		(6,631)
Total equity/(deficit)	(6,874)		(6,631)
Total	(14,329)		(13,256)
Eliminations | Crown Cork & Seal Company Inc.
Cash and cash equivalents
Receivables, net
Inventories
Prepaid expenses and other current assets
Intercompany debt receivables	(3,648)		(3,604)
Investments	(6,815)		(6,568)
Goodwill
Intangible assets, net
Property, plant and equipment, net
Other non-current assets
Total	(10,463)		(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	(3,648)		(3,604)
Postretirement and pension liabilities
Other non-current liabilities
Commitments and contingent liabilities
Noncontrolling interests
Crown Holdings shareholders’ equity/(deficit)	(6,815)		(6,568)
Total equity/(deficit)	(6,815)		(6,568)
Total	$ (10,463)		$ (10,172)