Employee Benefit Plans - Schedule of Benefit Obligation and Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in benefit obligation:
Defined Benefit Plan, Curtailments	$ 28
United States Pension Plan of US Entity [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	728	$ 649
Service cost	64	70	$ 65
Interest cost	26	28	21
Actuarial loss (gain)	(4)	21
Benefits paid	(59)	(35)
Plan amendments	0	0
Defined Benefit Plan, Curtailments	24	0
Other	4	(5)
Foreign currency translation adjustments	0	0
Benefit obligation at end of year	735	728	649
Change in plan assets:
Fair value of plan assets at beginning of year	648	617
Actual return on plan assets	(5)	39
Employer contributions	16	32
Benefits paid	(59)	(35)
Other	5	5
Foreign currency translation adjustments	0	0
Fair value of plan assets at end of year	595	648	617
Funded status - underfunded at end of year	(140)	(80)
Accumulated benefit obligation	681	662
Foreign Pension Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	872	799
Service cost	15	11	12
Interest cost	30	34	31
Actuarial loss (gain)	(23)	120
Benefits paid	(35)	(29)
Plan amendments	0	0
Defined Benefit Plan, Curtailments	2	0
Other	(6)	(3)
Foreign currency translation adjustments	(53)	(60)
Benefit obligation at end of year	798	872	799
Change in plan assets:
Fair value of plan assets at beginning of year	767	645
Actual return on plan assets	4	122
Employer contributions	28	78
Benefits paid	(35)	(29)
Other	6	0
Foreign currency translation adjustments	(45)	(49)
Fair value of plan assets at end of year	713	767	645
Funded status - underfunded at end of year	(85)	(105)
Accumulated benefit obligation	763	832
Other Postretirement Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	122	128
Service cost	5	6	6
Interest cost	4	5	5
Actuarial loss (gain)	(10)	1
Benefits paid	(11)	(7)
Plan amendments	0	(11)
Defined Benefit Plan, Curtailments	2	0
Other	(1)	0
Foreign currency translation adjustments	0	0
Benefit obligation at end of year	107	122	128
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	11	7
Benefits paid	(11)	(7)
Other	0	0
Foreign currency translation adjustments	0	0
Fair value of plan assets at end of year	0	0	$ 0
Funded status - underfunded at end of year	(107)	(122)
Accumulated benefit obligation	$ 107	$ 122