Long-Term Employee Benefits (Summarized Information on Pension and Other Long-Term Benefits Plans) (Details) (USD $) In Millions, unless otherwise specified						12 Months Ended																	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2011 Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2010 Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2012 U.S. Plans Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 U.S. Plans Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 U.S. Plans Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2011 U.S. Plans Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2012 Foreign Pension Plans, Defined Benefit [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Foreign Pension Plans, Defined Benefit [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Foreign Pension Plans, Defined Benefit [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2011 Foreign Pension Plans, Defined Benefit [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2012 All Other Plans [Member] Pension Plans, Defined Benefit [Member]		Dec. 31, 2011 All Other Plans [Member] Pension Plans, Defined Benefit [Member]		Dec. 31, 2012 All Other Plans [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2011 All Other Plans [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2012 Change In Benefit Obligation [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Change In Benefit Obligation [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Change In Benefit Obligation [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]		Dec. 31, 2011 Change In Benefit Obligation [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2012 Change In Plan Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Change In Plan Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Change In Plan Assets [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]	Dec. 31, 2011 Change In Plan Assets [Member] Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year																							$ 27,083	$ 23,924	$ 4,379		$ 3,989
Fair value of plan assets at beginning of year	19,399		17,794																									17,794	18,403	0	0
Service cost						37	33	29															277	249	37		33
Interest cost						174	212	238															1,165	1,253	174		212
Actual gain on plan assets																												2,326	471	0	0
Employer contributions																												848	341	261	312
Plan participants' contributions																							24	21	110		112	24	21	110	112
Actuarial loss (gain)																							2,245	3,062	60		441
Benefits paid																							(1,593)	(1,610)	(371)		(424)	(1,593)	(1,610)	(371)	(424)
Amendments																							(22)	2	(857)	[1]	11
Net effects of acquisitions/divestitures																							0	182	0		5	0	168	0	0
Benefit obligation at end of year																							29,179	27,083	3,532		4,379
Fair value of plan assets at end of year	19,399		17,794																									19,399	17,794	0	0
Funded status of plan									(6,625)	(6,894)	0	0	(1,443)	(901)	0	0	(1,712)	[2]	(1,494)	[2]	(3,532)	(4,379)
Other assets				5	4	0	0
Other accrued liabilities (Note 13)				(110)	(107)	(257)	(316)
Other liabilities (Note 15)				(9,303)	(9,186)	(3,271)	(4,063)
Liabilities related to assets held for sale				(372)	0	(4)	0
Net amount recognized				(9,780)	(9,289)	(3,532)	(4,379)
Defined Benefit Plan, Effect of Plan Amendment on Accumulated Benefit Obligation		838
Effect of Plan Amendment on Prior Service Cost		$ 838

[1] Due to an amendment in 2012 to the company's U.S. parent company retiree medical and dental plans for Medicare eligible pensioners and survivors from the company sponsored group plans to a company-funded Health Reimbursement Arrangement (HRA), the benefit obligation decreased by $838 and prior service cost was credited by $838.

[2] Includes pension plans maintained around the world where funding is not customary.