Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss(1)	$ (88)		$ (197)
Amortization of prior service credit	(8)	[1]	(12)	[1]
Amortization of net actuarial loss	53	[1]	28	[1]
Pension Benefits
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer	41				284
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year	299
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	340
Retiree Health
Components of Net Periodic Benefit Costs:
Service cost	2		2
Interest cost	9		9
Expected return on plan assets	0		0
Recognized net actuarial loss	0		0
Amortization of prior service credit	(7)		(11)
Recognized settlement loss	0		0
Defined Benefit Plans	4		0
Defined contribution plans (3)	0	[2]	0	[2]
Net Periodic Benefit Cost	4		0
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss(1)	0	[3]	0	[3]
Amortization of prior service credit	7		11
Amortization of net actuarial loss	0		0
Total Recognized in Other Comprehensive Loss(2)	7	[4]	11	[4]
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Loss	11		11
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer	13				70
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year	58
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	71
ITO [Member]
Components of Net Periodic Benefit Costs:
Defined contribution plans (3)	2	[2]	2	[2]
United States | Pension Benefits
Components of Net Periodic Benefit Costs:
Service cost	1		2
Interest cost	38		40
Expected return on plan assets	(38)		(38)
Recognized net actuarial loss	7		2
Amortization of prior service credit	(1)		0
Recognized settlement loss	27		12
Defined Benefit Plans	34		18
Defined contribution plans (3)	16	[2]	15	[2]
Net Periodic Benefit Cost	50		33
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss(1)	88	[3]	197	[3]
Amortization of prior service credit	1		0
Amortization of net actuarial loss	(34)		(14)
Total Recognized in Other Comprehensive Loss(2)	55	[4]	183	[4]
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Loss	105		216
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer	7				124
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year	173
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	180
Non-U.S. Plans | Pension Benefits
Components of Net Periodic Benefit Costs:
Service cost	8		9
Interest cost	53		69
Expected return on plan assets	(73)		(87)
Recognized net actuarial loss	19		14
Amortization of prior service credit	0		(1)
Recognized settlement loss	0		0
Defined Benefit Plans	7		4
Defined contribution plans (3)	9	[2]	10	[2]
Net Periodic Benefit Cost	16		14
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss(1)	0	[3]	0	[3]
Amortization of prior service credit	0		1
Amortization of net actuarial loss	(19)		(14)
Total Recognized in Other Comprehensive Loss(2)	(19)	[4]	(13)	[4]
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Loss	(3)		1
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer	34				160
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year	126
Anticipated total cash contributions to defined benefit and post retirement plans in the current year	$ 160

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

[2] The three months ended March 31, 2015 and 2014 exclude contributions of $2, respectively, related to our ITO business which is held for sale and reported as a discontinued operation as of March 31, 2015. Refer to Note 5 - Divestitures for additional information regarding this pending sale.

[3] The net actuarial loss (gain) for U.S. Plans primarily reflect; i) the remeasurement of our primary U.S. pension plans as a result of the payment of periodic settlements; and ii) adjustments for the actual valuation results based on January 1st plan census data.

[4] Amounts represent the pre-tax effect included within Other comprehensive loss. Refer to Note 16 - Other Comprehensive Loss for related tax effects and the after-tax amounts.