Employee Benefit Plans - (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Components of net periodic benefit cost [Abstract]
Defined Benefit Plan, Contributions by Employer			$ 77
Defined Contribution Plan, Cost Recognized			76
U.S. Pension Benefits
Components of net periodic benefit cost [Abstract]
Service cost	$ 13	$ 15	39	$ 49
Interest cost	7	6	21	20
Expected return on plan assets	(10)	(12)	(30)	(37)
Amortization of prior service credit	0	0	0	0
Amortization of net actuarial loss	3	3	8	7
Curtailment gain	0	0	0	0
Other	3	8	3	8
Net periodic cost	16	20	41	47
Non-U.S. Pension Benefits
Components of net periodic benefit cost [Abstract]
Service cost	4	4	11	12
Interest cost	7	7	21	23
Expected return on plan assets	(9)	(12)	(27)	(36)
Amortization of prior service credit	0	0	0	0
Amortization of net actuarial loss	1	2	4	4
Curtailment gain	0	0	0	0
Other	0	0	0	0
Net periodic cost	3	1	9	3
Other Postretirement Benefits
Components of net periodic benefit cost [Abstract]
Service cost	1	1	3	3
Interest cost	1	1	3	3
Expected return on plan assets	0	0	0	0
Amortization of prior service credit	(2)	(2)	(6)	(8)
Amortization of net actuarial loss	0	0	0	2
Curtailment gain	0	(2)	0	(11)
Other	0	0	0	0
Net periodic cost	$ 0	$ (2)	0	$ (11)
Minimum
Components of net periodic benefit cost [Abstract]
Defined Contribution Plan, Estimated Future Employer Contributions in Current Fiscal Year			11
Minimum | Pension Plan [Member]
Components of net periodic benefit cost [Abstract]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			4
Minimum | Other Postretirement Benefits
Components of net periodic benefit cost [Abstract]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			3
Maximum
Components of net periodic benefit cost [Abstract]
Defined Contribution Plan, Estimated Future Employer Contributions in Current Fiscal Year			12
Maximum | Pension Plan [Member]
Components of net periodic benefit cost [Abstract]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			5
Maximum | Other Postretirement Benefits
Components of net periodic benefit cost [Abstract]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year			$ 4