Debt (Schedule of Net Deferred Financing Costs) (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
		Oct. 31, 2014	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Debt Instrument [Line Items]
Deferred Finance Costs, Net			$ 22	[1]	$ 27	[1]	$ 27
Financing costs deferred			13	[2]	0		10	[3]
Accelerated amortization due to refinancing activity			(3)	[4]	0		(5)	[5]
Amortization			(5)		(5)		(5)
Deferred Finance Costs, Net			27		22	[1]	27	[1]
Senior Unsecured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Financing costs deferred							6
Term C-3 Loan Facility [Member]
Debt Instrument [Line Items]
Financing costs deferred							4
Senior Unsecured Notes Due 2018 [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity		$ (4)					(4)
Term C-2 Loan Facility [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity							(1)
New Credit Agreement [Member]
Debt Instrument [Line Items]
Financing costs deferred	[2]		5
Senior Unsecured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Financing costs deferred	[2]		6
Refunding loan for pollution control and industrial revenue bonds [Member]
Debt Instrument [Line Items]
Financing costs deferred	[2]		2
Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity	[4]		(2)
Pollution Control and Industrial Revenue Bonds [Member]
Debt Instrument [Line Items]
Accelerated amortization due to refinancing activity	[4]		(1)
Other Noncurrent Assets [Member] | RevolvingCreditandAccountsReceivableSecuritizationFacilities [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	[1]		4		5
Deferred Finance Costs, Net	[1]		$ 6		$ 4		$ 5

[1] Includes $6 million, $4 million and $5 million as of December 31, 2016, 2015 and 2014, respectively, related to the Company's revolving credit facility and accounts receivables securitization facility, which are included in noncurrent Other assets in the consolidated balance sheets.

[2] Includes $5 million, $6 million and $2 million related to the New Credit Agreement, the 1.125% Notes and the pollution control and industrial revenue bonds, respectively, all of which are being amortized through the term of the respective financing arrangement.

[3] Includes $6 million related to the issuance of the 3.250% Notes and $4 million related to the September 2014 amendment to the Celanese US existing senior secured credit facilities.

[4] Includes $2 million and $1 million related to the senior secured credit facilities and the pollution control and industrial revenue bonds, respectively, which are included in Refinancing expense in the consolidated statement of operations during the year ended December 31, 2016.

[5] Includes $4 million related to the 6.625% Notes redemption and $1 million related to the Term C-2 loan facility conversion.