Condensed Combining Financial Information - Condensed Combining Statement of Cash Flows (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Net cash provided by/(used for) operating activities	$ (492)	$ (475)
Capital expenditures	(200)	(200)
Beneficial interests in transferred receivables	335	507
Acquisition of business, net of cash acquired	(3,907)	0
Proceeds from sale of property, plant and equipment	5	5
Payments for (Proceeds from) Hedge, Investing Activities	(25)	0
Net cash (used for) provided by investing activities	(3,792)	312
Proceeds from long-term debt	4,082	1,053
Payments of long-term debt	(37)	(1,103)
Net change in revolving credit facility and short-term debt	201	249
Debt issue costs	(70)	(15)
Common stock issued	1	8
Common stock repurchased	(4)	(277)
Dividend paid to noncontrolling interests	(6)	(37)
Foreign exchange derivatives related to debt	(5)	11
Net cash provided by (used for) financing activities	4,162	(111)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(6)	11
Net change in cash, cash equivalents and restricted cash	(128)	(263)
Cash, cash equivalents and restricted cash beginning balance	435	576	$ 576
Cash, cash equivalents and restricted cash ending balance	307	313	435
Crown Americas, LLC
Net cash provided by/(used for) operating activities	(492)	(475)
Capital expenditures	(200)	(200)
Beneficial interests in transferred receivables	335	507
Acquisition of business, net of cash acquired	(3,907)
Proceeds from sale of property, plant and equipment	5	5
Foreign exchange derivatives related to an acquisition	(25)
Payments for (Proceeds from) Hedge, Investing Activities		0
Net cash (used for) provided by investing activities	(3,792)	312
Proceeds from long-term debt	4,082	1,053
Payments of long-term debt	(37)	(1,103)
Net change in revolving credit facility and short-term debt	201	249
Debt issue costs	(70)	(15)
Common stock issued	1	8
Common stock repurchased	(4)	(277)
Proceeds from Contributed Capital	0
Dividends paid	0	0
Dividend paid to noncontrolling interests	(6)	(37)
Foreign exchange derivatives related to debt	(5)	11
Net cash provided by (used for) financing activities	4,162	(111)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(6)	11
Net change in cash, cash equivalents and restricted cash	(128)	(263)
Cash, cash equivalents and restricted cash beginning balance	435	576	576
Cash, cash equivalents and restricted cash ending balance	307	313	435
Crown Americas, LLC | Parent
Net cash provided by/(used for) operating activities	(24)	(13)
Capital expenditures
Beneficial interests in transferred receivables
Acquisition of business, net of cash acquired
Proceeds from sale of property, plant and equipment
Proceeds from Contributions from Affiliates		235
Foreign exchange derivatives related to an acquisition
Net cash (used for) provided by investing activities		235
Proceeds from long-term debt
Payments of long-term debt
Net change in revolving credit facility and short-term debt
Net change in long-term intercompany balances	27	47
Debt issue costs
Common stock issued	1	8
Common stock repurchased	(4)	(277)
Proceeds from Contributed Capital
Dividends paid
Dividend paid to noncontrolling interests
Foreign exchange derivatives related to debt
Net cash provided by (used for) financing activities	24	(222)
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash beginning balance
Cash, cash equivalents and restricted cash ending balance
Crown Americas, LLC | Issuer
Net cash provided by/(used for) operating activities	(45)	(28)
Capital expenditures
Beneficial interests in transferred receivables
Acquisition of business, net of cash acquired
Proceeds from sale of property, plant and equipment
Proceeds from Contributions from Affiliates	(80)
Foreign exchange derivatives related to an acquisition
Net cash (used for) provided by investing activities	(80)
Proceeds from long-term debt	975	750
Payments of long-term debt	(15)	(1,010)
Net change in revolving credit facility and short-term debt	160	235
Net change in long-term intercompany balances	(973)	22
Debt issue costs	(40)	(14)
Common stock issued
Common stock repurchased
Proceeds from Contributed Capital
Dividends paid
Dividend paid to noncontrolling interests
Foreign exchange derivatives related to debt
Net cash provided by (used for) financing activities	107	(17)
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Net change in cash, cash equivalents and restricted cash	(18)	(45)
Cash, cash equivalents and restricted cash beginning balance	36	83	83
Cash, cash equivalents and restricted cash ending balance	18	38	36
Crown Americas, LLC | Guarantors
Net cash provided by/(used for) operating activities	32	(23)
Capital expenditures	(36)	(78)
Beneficial interests in transferred receivables
Acquisition of business, net of cash acquired
Proceeds from sale of property, plant and equipment		1
Foreign exchange derivatives related to an acquisition
Net cash (used for) provided by investing activities	(36)	(77)
Proceeds from long-term debt	1,150	8
Payments of long-term debt	(1)
Net change in revolving credit facility and short-term debt
Net change in long-term intercompany balances	(1,147)	94
Debt issue costs
Common stock issued
Common stock repurchased
Proceeds from Contributed Capital
Dividends paid
Dividend paid to noncontrolling interests
Foreign exchange derivatives related to debt
Net cash provided by (used for) financing activities	2	102
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Net change in cash, cash equivalents and restricted cash	(2)	2
Cash, cash equivalents and restricted cash beginning balance	3
Cash, cash equivalents and restricted cash ending balance	1	2	3
Crown Americas, LLC | Non- Guarantors
Net cash provided by/(used for) operating activities	(454)	(383)
Capital expenditures	(164)	(122)
Beneficial interests in transferred receivables	335	507
Acquisition of business, net of cash acquired	(3,907)
Proceeds from sale of property, plant and equipment	5	4
Proceeds from Contributions from Affiliates
Foreign exchange derivatives related to an acquisition	(25)
Payments for (Proceeds from) Hedge, Investing Activities		0
Net cash (used for) provided by investing activities	(3,756)	389
Proceeds from long-term debt	1,957	295
Payments of long-term debt	(21)	(93)
Net change in revolving credit facility and short-term debt	41	14
Net change in long-term intercompany balances	2,093	(163)
Debt issue costs	(30)	(1)
Common stock issued
Common stock repurchased
Proceeds from Contributed Capital	80
Dividends paid	(1)	(263)
Dividend paid to noncontrolling interests	(6)	(37)
Foreign exchange derivatives related to debt	(5)	11
Net cash provided by (used for) financing activities	4,108	(237)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(6)	11
Net change in cash, cash equivalents and restricted cash	(108)	(220)
Cash, cash equivalents and restricted cash beginning balance	396	493	493
Cash, cash equivalents and restricted cash ending balance	288	273	396
Crown Cork & Seal Company Inc.
Net cash provided by/(used for) operating activities	(492)	(475)
Capital expenditures	(200)	(200)
Beneficial interests in transferred receivables	335	507
Acquisition of business, net of cash acquired	(3,907)
Proceeds from sale of property, plant and equipment	5	5
Foreign exchange derivatives related to an acquisition	(25)
Net cash (used for) provided by investing activities	(3,792)	312
Proceeds from long-term debt	4,082	1,053
Payments of long-term debt	(37)	(1,103)
Net change in revolving credit facility and short-term debt	201	249
Net change in long-term intercompany balances		0
Debt issue costs	(70)	(15)
Common stock issued	1	8
Common stock repurchased	(4)	(277)
Dividends paid	0	0
Dividend paid to noncontrolling interests	(6)	(37)
Foreign exchange derivatives related to debt	(5)	11
Net cash provided by (used for) financing activities	4,162	(111)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(6)	11
Net change in cash, cash equivalents and restricted cash	(128)	(263)
Cash, cash equivalents and restricted cash beginning balance	435	576	576
Cash, cash equivalents and restricted cash ending balance	307	313	435
Crown Cork & Seal Company Inc. | Parent
Net cash provided by/(used for) operating activities	(24)	(13)
Capital expenditures
Beneficial interests in transferred receivables
Proceeds from sale of property, plant and equipment
Proceeds from Contributions from Affiliates		235
Foreign exchange derivatives related to an acquisition
Net cash (used for) provided by investing activities	0	235
Proceeds from long-term debt
Payments of long-term debt
Net change in revolving credit facility and short-term debt
Net change in long-term intercompany balances	27	47
Debt issue costs
Common stock issued	1	8
Common stock repurchased	(4)	(277)
Dividends paid
Dividend paid to noncontrolling interests
Foreign exchange derivatives related to debt
Net cash provided by (used for) financing activities	24	(222)
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash beginning balance
Cash, cash equivalents and restricted cash ending balance
Crown Cork & Seal Company Inc. | Issuer
Net cash provided by/(used for) operating activities	(44)	(41)
Capital expenditures
Beneficial interests in transferred receivables
Proceeds from sale of property, plant and equipment
Foreign exchange derivatives related to an acquisition
Net cash (used for) provided by investing activities
Proceeds from long-term debt
Payments of long-term debt
Net change in revolving credit facility and short-term debt
Net change in long-term intercompany balances	44	41
Debt issue costs
Common stock issued
Common stock repurchased
Dividends paid
Dividend paid to noncontrolling interests
Foreign exchange derivatives related to debt
Net cash provided by (used for) financing activities	44	41
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash beginning balance
Cash, cash equivalents and restricted cash ending balance
Crown Cork & Seal Company Inc. | Non- Guarantors
Net cash provided by/(used for) operating activities	(423)	(413)
Capital expenditures	(200)	(200)
Beneficial interests in transferred receivables	335	507
Acquisition of business, net of cash acquired	(3,907)
Proceeds from sale of property, plant and equipment	5	5
Foreign exchange derivatives related to an acquisition	(25)
Net cash (used for) provided by investing activities	(3,792)	312
Proceeds from long-term debt	4,082	1,053
Payments of long-term debt	(37)	(1,103)
Net change in revolving credit facility and short-term debt	201	249
Net change in long-term intercompany balances	(71)	(88)
Debt issue costs	(70)	(15)
Common stock issued
Common stock repurchased
Dividends paid	(1)	(243)
Dividend paid to noncontrolling interests	(6)	(37)
Foreign exchange derivatives related to debt	(5)	11
Net cash provided by (used for) financing activities	4,093	(173)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(6)	11
Net change in cash, cash equivalents and restricted cash	(128)	(263)
Cash, cash equivalents and restricted cash beginning balance	435	576	576
Cash, cash equivalents and restricted cash ending balance	307	313	435
Eliminations | Crown Americas, LLC
Net cash provided by/(used for) operating activities	(1)	(28)
Capital expenditures
Beneficial interests in transferred receivables
Acquisition of business, net of cash acquired
Proceeds from sale of property, plant and equipment
Proceeds from Contributions from Affiliates	80	(235)
Foreign exchange derivatives related to an acquisition
Net cash (used for) provided by investing activities	80	(235)
Proceeds from long-term debt
Payments of long-term debt
Net change in revolving credit facility and short-term debt
Net change in long-term intercompany balances
Debt issue costs
Common stock issued
Common stock repurchased
Proceeds from Contributed Capital	(80)
Dividends paid	1	263
Dividend paid to noncontrolling interests
Foreign exchange derivatives related to debt
Net cash provided by (used for) financing activities	(79)	263
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash beginning balance
Cash, cash equivalents and restricted cash ending balance
Eliminations | Crown Cork & Seal Company Inc.
Net cash provided by/(used for) operating activities	(1)	(8)
Capital expenditures
Beneficial interests in transferred receivables
Proceeds from sale of property, plant and equipment
Proceeds from Contributions from Affiliates		(235)
Foreign exchange derivatives related to an acquisition
Net cash (used for) provided by investing activities		(235)
Proceeds from long-term debt
Payments of long-term debt
Net change in revolving credit facility and short-term debt
Net change in long-term intercompany balances
Debt issue costs
Common stock issued
Common stock repurchased
Dividends paid	1	243
Dividend paid to noncontrolling interests
Foreign exchange derivatives related to debt
Net cash provided by (used for) financing activities	1	243
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash beginning balance
Cash, cash equivalents and restricted cash ending balance