Shareholders' Equity (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax			$ (454)
Gains (losses) arising during the year classified into accumulated OCI, net of tax			35
(Gains) losses reclassified from accumulated OCI, net of tax			115
Other comprehensive income (loss), net of tax	$ 88	$ (53)	150	$ (69)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(304)		(304)
Translation Adjustments and Gains (Losses) From Intra-Entity Transactions of a Long-Term Nature
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax			(332)
Gains (losses) arising during the year classified into accumulated OCI, net of tax			90
(Gains) losses reclassified from accumulated OCI, net of tax			37
Other comprehensive income (loss), net of tax			127
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(205)		(205)
Pension and Post-Retirement Benefits
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax			(127)
Gains (losses) arising during the year classified into accumulated OCI, net of tax			(3)
(Gains) losses reclassified from accumulated OCI, net of tax			29
Other comprehensive income (loss), net of tax			26
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(101)		(101)
Derivative Instruments
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax			5
Gains (losses) arising during the year classified into accumulated OCI, net of tax			(52)
(Gains) losses reclassified from accumulated OCI, net of tax			49
Other comprehensive income (loss), net of tax			(3)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 2		$ 2