Consolidating Guarantor Financial Information (Schedule of Consolidating Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 1,510	$ 984	$ 1,100	$ 959
Trade receivables - third party and affiliates	1,016	867
Non-trade receivables, net	200	343
Inventories, net	771	804
Deferred income taxes	111	115
Marketable securities, at fair value	36	41
Other assets	43	28
Total current assets	3,687	3,182
Investments in affiliates	857	841
Property, plant and equipment	3,618	3,425
Deferred income taxes	296	289
Other assets	365	341
Goodwill	756	798
Intangible assets, net	131	142
Total assets	9,710	9,018
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	765	177
Trade payables - third party and affiliates	816	799
Other liabilities	483	541
Deferred income taxes	10	10
Income taxes payable	115	18
Total current liabilities	2,189	1,545
Noncurrent Liabilities
Long-term debt	2,639	2,887
Deferred income taxes	225	225
Uncertain tax positions	150	200
Benefit obligations	1,077	1,175
Other liabilities	295	287
Total noncurrent liabilities	4,386	4,774
Total Celanese Corporation stockholders' equity	2,944	2,699
Noncontrolling interests	191	0
Total equity	3,135	2,699
Total liabilities and equity	9,710	9,018
Parent Guarantor [Member]
Current Assets
Cash and cash equivalents	0	0	0	10
Trade receivables - third party and affiliates	0	0
Non-trade receivables, net	35	33
Inventories, net	0	0
Deferred income taxes	0	0
Marketable securities, at fair value	0	0
Other assets	0	0
Total current assets	35	33
Investments in affiliates	2,910	2,667
Property, plant and equipment	0	0
Deferred income taxes	0	0
Other assets	0	0
Goodwill	0	0
Intangible assets, net	0	0
Total assets	2,945	2,700
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	0	0
Trade payables - third party and affiliates	0	0
Other liabilities	1	1
Deferred income taxes	0	0
Income taxes payable	0	0
Total current liabilities	1	1
Noncurrent Liabilities
Long-term debt	0	0
Deferred income taxes	0	0
Uncertain tax positions	0	0
Benefit obligations	0	0
Other liabilities	0	0
Total noncurrent liabilities	0	0
Total Celanese Corporation stockholders' equity	2,944	2,699
Noncontrolling interests	0	0
Total equity	2,944	2,699
Total liabilities and equity	2,945	2,700
Issuer [Member]
Current Assets
Cash and cash equivalents	0	0	0	0
Trade receivables - third party and affiliates	0	0
Non-trade receivables, net	1,113	482
Inventories, net	0	0
Deferred income taxes	0	0
Marketable securities, at fair value	0	0
Other assets	0	5
Total current assets	1,113	487
Investments in affiliates	4,664	4,458
Property, plant and equipment	0	0
Deferred income taxes	0	0
Other assets	1,915	1,965
Goodwill	0	0
Intangible assets, net	0	0
Total assets	7,692	6,910
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	2,429	1,713
Trade payables - third party and affiliates	2	0
Other liabilities	62	28
Deferred income taxes	17	17
Income taxes payable	0	0
Total current liabilities	2,510	1,758
Noncurrent Liabilities
Long-term debt	2,217	2,468
Deferred income taxes	9	8
Uncertain tax positions	6	6
Benefit obligations	0	0
Other liabilities	40	3
Total noncurrent liabilities	2,272	2,485
Total Celanese Corporation stockholders' equity	2,910	2,667
Noncontrolling interests	0	0
Total equity	2,910	2,667
Total liabilities and equity	7,692	6,910
Subsidiary Guarantors [Member]
Current Assets
Cash and cash equivalents	824	284	398	275
Trade receivables - third party and affiliates	147	131
Non-trade receivables, net	2,215	2,166
Inventories, net	251	243
Deferred income taxes	75	74
Marketable securities, at fair value	36	41
Other assets	19	15
Total current assets	3,567	2,954
Investments in affiliates	1,987	1,677
Property, plant and equipment	998	969
Deferred income taxes	270	248
Other assets	145	144
Goodwill	305	305
Intangible assets, net	68	64
Total assets	7,340	6,361
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	827	122
Trade payables - third party and affiliates	399	312
Other liabilities	324	441
Deferred income taxes	0	0
Income taxes payable	552	460
Total current liabilities	2,102	1,335
Noncurrent Liabilities
Long-term debt	830	825
Deferred income taxes	11	0
Uncertain tax positions	8	16
Benefit obligations	870	943
Other liabilities	115	91
Total noncurrent liabilities	1,834	1,875
Total Celanese Corporation stockholders' equity	3,404	3,151
Noncontrolling interests	0	0
Total equity	3,404	3,151
Total liabilities and equity	7,340	6,361
Non-Guarantors [Member]
Current Assets
Cash and cash equivalents	686	700	702	674
Trade receivables - third party and affiliates	1,043	877
Non-trade receivables, net	490	586
Inventories, net	604	622
Deferred income taxes	53	58
Marketable securities, at fair value	0	0
Other assets	43	24
Total current assets	2,919	2,867
Investments in affiliates	592	594
Property, plant and equipment	2,620	2,456
Deferred income taxes	27	49
Other assets	314	285
Goodwill	451	493
Intangible assets, net	63	78
Total assets	6,986	6,822
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	356	373
Trade payables - third party and affiliates	589	628
Other liabilities	445	513
Deferred income taxes	10	10
Income taxes payable	52	32
Total current liabilities	1,452	1,556
Noncurrent Liabilities
Long-term debt	1,539	1,646
Deferred income taxes	206	225
Uncertain tax positions	136	178
Benefit obligations	207	232
Other liabilities	209	202
Total noncurrent liabilities	2,297	2,483
Total Celanese Corporation stockholders' equity	3,046	2,783
Noncontrolling interests	191	0
Total equity	3,237	2,783
Total liabilities and equity	6,986	6,822
Eliminations [Member]
Current Assets
Cash and cash equivalents	0	0	0	0
Trade receivables - third party and affiliates	(174)	(141)
Non-trade receivables, net	(3,653)	(2,924)
Inventories, net	(84)	(61)
Deferred income taxes	(17)	(17)
Marketable securities, at fair value	0	0
Other assets	(19)	(16)
Total current assets	(3,947)	(3,159)
Investments in affiliates	(9,296)	(8,555)
Property, plant and equipment	0	0
Deferred income taxes	(1)	(8)
Other assets	(2,009)	(2,053)
Goodwill	0	0
Intangible assets, net	0	0
Total assets	(15,253)	(13,775)
Current Liabilities
Short-term borrowings and current installments of long-term debt - third party and affiliates	(2,847)	(2,031)
Trade payables - third party and affiliates	(174)	(141)
Other liabilities	(349)	(442)
Deferred income taxes	(17)	(17)
Income taxes payable	(489)	(474)
Total current liabilities	(3,876)	(3,105)
Noncurrent Liabilities
Long-term debt	(1,947)	(2,052)
Deferred income taxes	(1)	(8)
Uncertain tax positions	0	0
Benefit obligations	0	0
Other liabilities	(69)	(9)
Total noncurrent liabilities	(2,017)	(2,069)
Total Celanese Corporation stockholders' equity	(9,360)	(8,601)
Noncontrolling interests	0	0
Total equity	(9,360)	(8,601)
Total liabilities and equity	$ (15,253)	$ (13,775)