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Shareholders' Deficit (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of changes in accumulated comprehensive income [Line Items]
Accumulated other comprehensive loss	$ (411)
Gains (losses) arising during the year classified into AOCI, net of tax	57
(Gains) losses reclassified from AOCI, net of tax	8
Other comprehensive income (loss), net of tax	65	$ (161)
Accumulated other comprehensive loss	(346)
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	(182)
Gains (losses) arising during the year classified into AOCI, net of tax	3
(Gains) losses reclassified from AOCI, net of tax	0
Other comprehensive income (loss), net of tax	3
Accumulated other comprehensive loss	(179)
Pension and Post-Retirement Benefits
Schedule of changes in accumulated comprehensive income [Line Items]
Accumulated other comprehensive loss	(96)
Gains (losses) arising during the year classified into AOCI, net of tax	36
(Gains) losses reclassified from AOCI, net of tax	5
Other comprehensive income (loss), net of tax	41
Accumulated other comprehensive loss	(55)
Derivative Instruments
Schedule of changes in accumulated comprehensive income [Line Items]
Accumulated other comprehensive loss	(133)
Gains (losses) arising during the year classified into AOCI, net of tax	18
(Gains) losses reclassified from AOCI, net of tax	3
Other comprehensive income (loss), net of tax	21
Accumulated other comprehensive loss	$ (112)

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