Shareholders' Equity (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 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			8
(Gains) losses reclassified from accumulated OCI, net of tax			54
Other comprehensive income (loss), net of tax	$ (13)	$ (22)	62	$ (16)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(392)		(392)
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			53
(Gains) losses reclassified from accumulated OCI, net of tax			(5)
Other comprehensive income (loss), net of tax			48
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(284)		(284)
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			(8)
(Gains) losses reclassified from accumulated OCI, net of tax			23
Other comprehensive income (loss), net of tax			15
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(112)		(112)
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			(37)
(Gains) losses reclassified from accumulated OCI, net of tax			36
Other comprehensive income (loss), net of tax			(1)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 4		$ 4