Employee Benefit Plans (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Components of Net Periodic Benefit Costs:
Defined Benefit Plans		$ 43	$ 41
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss		(123)	(88)
Amortization of prior service credit	[1]	(2)	(8)
Amortization of net actuarial loss	[1]	52	53
Pension Benefits
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer		36		$ 309
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year		104
Anticipated total cash contributions to defined benefit and post retirement plans in the current year		140
Retiree Health
Components of Net Periodic Benefit Costs:
Service cost		1	2
Interest cost		8	9
Expected return on plan assets		0	0
Recognized net actuarial loss		1	0
Amortization of prior service credit		(1)	(7)
Recognized settlement loss		0	0
Defined Benefit Plans		9	4
Net Periodic Benefit Cost		9	4
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss	[2]	0	0
Amortization of prior service credit		1	7
Amortization of net actuarial loss		(1)	0
Total Recognized in Other Comprehensive Loss	[3]	0	7
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Loss		9	11
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer		14		63
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year		56
Anticipated total cash contributions to defined benefit and post retirement plans in the current year		70
United States | Pension Benefits
Components of Net Periodic Benefit Costs:
Service cost		1	1
Interest cost		38	38
Expected return on plan assets		(40)	(38)
Recognized net actuarial loss		5	7
Amortization of prior service credit		0	(1)
Recognized settlement loss		29	27
Defined Benefit Plans		33	34
Defined contribution plans	[3]	14	16
Net Periodic Benefit Cost		47	50
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss	[2]	123	88
Amortization of prior service credit		0	1
Amortization of net actuarial loss		(34)	(34)
Total Recognized in Other Comprehensive Loss	[3]	89	55
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Loss		136	105
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer		7		177
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year		18
Anticipated total cash contributions to defined benefit and post retirement plans in the current year		25
Non-U.S. Plans | Pension Benefits
Components of Net Periodic Benefit Costs:
Service cost		6	8
Interest cost		52	53
Expected return on plan assets		(64)	(73)
Recognized net actuarial loss		17	19
Amortization of prior service credit		(1)	0
Recognized settlement loss		0	0
Defined Benefit Plans		10	7
Defined contribution plans	[3]	10	9
Net Periodic Benefit Cost		20	16
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Loss:
Net actuarial loss	[2]	0	0
Amortization of prior service credit		1	0
Amortization of net actuarial loss		(17)	(19)
Total Recognized in Other Comprehensive Loss	[3]	(16)	(19)
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Loss		4	$ (3)
Contributions [Abstract]
Defined Benefit Plan, Contributions by Employer		29		$ 132
Anticipated additional contributions to the defined benefit and post retirement plans in current fiscal year		86
Anticipated total cash contributions to defined benefit and post retirement plans in the current year		$ 115

[1] Reclassified to Total Net Periodic Benefit Cost - refer to Note 13 - Employee Benefit Plans for additional information.

[2] The net actuarial loss for U.S. Plans primarily reflects the remeasurement of our primary U.S. pension plans as a result of the payment of periodic settlements.

[3] Amounts represent the pre-tax effect included within Other comprehensive loss. Refer to Note 15 - Other Comprehensive Income (Loss) for related tax effects and the after-tax amounts.