Shareholders' Deficit (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of changes in accumulated comprehensive income [Line Items]
Accumulated other comprehensive loss	$ (324)		$ (411)
Gains (losses) arising during the year classified into AOCI, net of tax	(17)		56
(Gains) losses reclassified from AOCI, net of tax	10		24
Other comprehensive income (loss), net of tax	(7)	$ 36	80	$ (64)
Accumulated other comprehensive loss	(331)		(331)
Translation Adjustments and Gains (Losses) From Intra-Entity Transactions of a Long-Term Nature
Schedule of changes in accumulated comprehensive income [Line Items]
Accumulated other comprehensive loss	(165)		(182)
Gains (losses) arising during the year classified into AOCI, net of tax	(19)		(2)
(Gains) losses reclassified from AOCI, net of tax	0		0
Other comprehensive income (loss), net of tax	(19)		(2)
Accumulated other comprehensive loss	(184)		(184)
Pension and Post-Retirement Benefits
Schedule of changes in accumulated comprehensive income [Line Items]
Accumulated other comprehensive loss	(44)		(96)
Gains (losses) arising during the year classified into AOCI, net of tax	2		46
(Gains) losses reclassified from AOCI, net of tax	4		12
Other comprehensive income (loss), net of tax	6		58
Accumulated other comprehensive loss	(38)		(38)
Derivative Instruments
Schedule of changes in accumulated comprehensive income [Line Items]
Accumulated other comprehensive loss	(115)		(133)
Gains (losses) arising during the year classified into AOCI, net of tax	0		12
(Gains) losses reclassified from AOCI, net of tax	6		12
Other comprehensive income (loss), net of tax	6		24
Accumulated other comprehensive loss	$ (109)		$ (109)