Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Income:
Net actuarial gain	$ 0		$ 31		$ 25		$ 50
Amortization of prior service credit	(12)	[1]	(16)	[1]	(34)	[1]	(48)	[1]
Amortization of net actuarial loss	42	[1]	51	[1]	174		135
Pension Benefits
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer					162
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year					33
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	195				195
Retiree Health
Components of Net Periodic Benefit Costs:
Service cost	2		3		7		7
Interest cost	8		9		25		31
Expected return on plan assets	0		0		0		0
Recognized net actuarial loss	0		0		1		1
Amortization of prior service credit	(10)		(10)		(32)		(31)
Recognized curtailment gain					0		0
Recognized settlement loss	0		0		0		0
Defined Benefit Plans	0		2		1		8
Defined contribution plans	0		0		0		0
Net Periodic Benefit Cost	0		2		1		8
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Income:
Net actuarial gain	0		(31)		(36)		(31)
Amortization of prior service credit	10		10		32		31
Amortization of net actuarial loss	0		0		(1)		(1)
Total Recognized in Other Comprehensive Income	10	[2]	(21)	[2]	(5)	[2]	(1)	[2]
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	10		(19)		(4)		7
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer					52
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year					28
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	80				80
U.S. Plans | Pension Benefits
Components of Net Periodic Benefit Costs:
Service cost	2		28		7		84
Interest cost	37		47		109		139
Expected return on plan assets	(41)		(53)		(130)		(157)
Recognized net actuarial loss	2		12		16		39
Amortization of prior service credit	(1)		(6)		(1)		(17)
Recognized curtailment gain					0		0
Recognized settlement loss	20		25		99		55
Defined Benefit Plans	19		53		100		143
Defined contribution plans	15		7		53		22
Net Periodic Benefit Cost	34		60		153		165
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Income:
Net actuarial gain	0		0		11		(19)
Amortization of prior service credit	1		6		1		17
Amortization of net actuarial loss	(22)		(37)		(115)		(94)
Total Recognized in Other Comprehensive Income	(21)	[2]	(31)	[2]	(103)	[2]	(96)
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	13		29		50		69
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer					20
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year					6
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	26				26
Non-U.S. Plans | Pension Benefits
Components of Net Periodic Benefit Costs:
Service cost	24		21		69		62
Interest cost	64		66		193		202
Expected return on plan assets	(78)		(76)		(235)		(229)
Recognized net actuarial loss	20		14		58		40
Amortization of prior service credit	(1)		0		(1)		0
Recognized curtailment gain					(6)		0
Recognized settlement loss	0		0		0		0
Defined Benefit Plans	29		25		78		75
Defined contribution plans	7		10		20		26
Net Periodic Benefit Cost	36		35		98		101
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Income:
Net actuarial gain	0		0		0		0
Amortization of prior service credit	1		0		1		0
Amortization of net actuarial loss	(20)		(14)		(58)		(40)
Total Recognized in Other Comprehensive Income	(19)		(14)		(57)		(40)
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	17		21		41		61
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer					142
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year					27
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	$ 169				$ 169

[1] Reclassified to Total Net Periodic Benefit Cost - refer to Note 14 - Employee Benefit Plans for additional information.

[2] (1)Amounts represent the pre-tax effect included within Other comprehensive income. Refer to Note 16 - Other Comprehensive Income for related tax effects and the after-tax amounts.