Pensions Benefit Plans and Other Postretirement Benefits (Details)-K - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S Pension Plans
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	$ 2,428	$ 2,275
Change in benefit obligations:
Service cost	24	22	$ 27
Interest cost	96	105	106
Expected asset return	(170)	(176)	(183)
Actuarial loss	74	68	110
Net amortization	74	68	110
Net periodic pension cost	24	19	60
Actuarial (gain) loss, including the effect of change in discount rates	(107)	264
Curtailment, settlement, and plan amendment		(56)
Special termination		30	8
Benefit payments	(252)	(182)
Other	1
Net change in benefit obligations	(238)	153
Obligations at end of year	2,190	2,428	2,275
Changes in fair value of pension plan assets
Fair value at beginning of year	2,190	2,273
Actual gain (loss) on plan assets	(32)	155
Benefit payments	(252)	(182)
Employer contributions	2
Settlements		(56)
Other	1
Net change in fair value of assets	(281)	(83)
Fair value at end of year	1,909	2,190	2,273
Non-U.S. Pension Plans
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	1,311	1,866
Change in benefit obligations:
Service cost	15	23	33
Interest cost	44	69	72
Expected asset return	(67)	(86)	(91)
Prior service cost			(1)
Actuarial loss	15	18	28
Net amortization	15	18	27
Net periodic pension cost	7	24	41
Actuarial (gain) loss, including the effect of change in discount rates	(9)	131
Gain from curtailment and plan amendment		(22)
Curtailment, settlement, and plan amendment		(567)
Acquisitions	37
Participant contributions	1	5
Benefit payments	(58)	(91)
Foreign currency translation	(131)	(125)
Net change in benefit obligations	(101)	(555)
Obligations at end of year	1,210	1,311	1,866
Changes in fair value of pension plan assets
Fair value at beginning of year	1,094	1,578
Actual gain (loss) on plan assets	42	188
Benefit payments	(58)	(91)
Employer contributions	15	28
Participant contributions	1	5
Settlements		(519)
Acquisitions	22
Foreign currency translation	(104)	(94)
Other		(1)
Net change in fair value of assets	(82)	(484)
Fair value at end of year	1,012	1,094	1,578
U.S Postretirement Benefit Plans
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	111	111
Change in benefit obligations:
Service cost			1
Interest cost	4	5	5
Prior service cost	(8)	(8)	(7)
Actuarial loss	2	2	3
Net amortization	(6)	(6)	(4)
Net periodic pension cost	(2)	(1)	(3)
Actuarial (gain) loss, including the effect of change in discount rates	(10)	7
Benefit payments	(8)	(12)
Net change in benefit obligations	(14)
Obligations at end of year	97	111	111
Changes in fair value of pension plan assets
Benefit payments	(8)	(12)
Non-U.S. Postretirement Benefit Plans
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	81	90
Change in benefit obligations:
Service cost	1	1	1
Interest cost	3	4	4
Net periodic pension cost	4	5	5
Actuarial (gain) loss, including the effect of change in discount rates	(1)	(2)
Benefit payments	(3)	(3)
Other		(2)
Foreign currency translation	13	7
Net change in benefit obligations	(13)	(9)
Obligations at end of year	68	81	$ 90
Changes in fair value of pension plan assets
Benefit payments	$ (3)	$ (3)