Shareholders' Deficit (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (549)		$ (388)
Gains (losses) arising during the year classified into accumulated OCI, net of tax	54		(104)
(Gains) losses reclassified from accumulated OCI, net of tax	7		4
Other comprehensive income (loss), net of tax	61	$ (56)	(100)	$ (46)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(488)		(488)
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	(323)		(221)
Gains (losses) arising during the year classified into accumulated OCI, net of tax	68		(34)
(Gains) losses reclassified from accumulated OCI, net of tax	0		0
Other comprehensive income (loss), net of tax	68		(34)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(255)		(255)
Pension and Post-Retirement Benefits
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	(100)		(104)
Gains (losses) arising during the year classified into accumulated OCI, net of tax	0		0
(Gains) losses reclassified from accumulated OCI, net of tax	4		8
Other comprehensive income (loss), net of tax	4		8
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(96)		(96)
Derivative Instruments
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	(126)		(63)
Gains (losses) arising during the year classified into accumulated OCI, net of tax	(14)		(70)
(Gains) losses reclassified from accumulated OCI, net of tax	3		(4)
Other comprehensive income (loss), net of tax	(11)		(74)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (137)		$ (137)