Equity Accumulated Other Comprehensive Loss - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance		$ (59)
Other Comprehensive Income (Loss), Tax		3	$ (1)	$ (2)
Current period change		9	(3)	(4)
Accumulated Other Comprehensive Income (Loss), Ending Balance		(50)	(59)
Dividends [Abstract]
Common Stock, Dividends, Per Share, Declared					$ 0.09
Payments of Ordinary Dividends, Common Stock		0	0	31
Currency Translation Adjustments (1)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	[1]	(8)	(8)	(8)
Other comprehensive (loss) income before reclassifications	[1]	(1)	0	0
Amounts reclassified from accumulated other comprehensive loss	[1]	0	0	0
Other Comprehensive Income (Loss), Tax	[1]	0	0	0
Current period change	[1]	(1)	0	0
Accumulated Other Comprehensive Income (Loss), Ending Balance	[1]	(9)	(8)	(8)
Minimum Pension Liability Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance		(51)	(48)	(44)
Other comprehensive (loss) income before reclassifications		10	(6)	(8)
Amounts reclassified from accumulated other comprehensive loss	[2]	3	2	2
Other Comprehensive Income (Loss), Tax		(3)	1	2
Current period change		10	(3)	(4)
Accumulated Other Comprehensive Income (Loss), Ending Balance		(41)	(51)	(48)
Accumulated Other Comprehensive Loss (2)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	[3]	(59)	(56)	(52)
Other comprehensive (loss) income before reclassifications	[3]	9	(6)	(8)
Amounts reclassified from accumulated other comprehensive loss	[3]	3	2	2
Other Comprehensive Income (Loss), Tax	[3]	(3)	1	2
Current period change	[3]	9	(3)	(4)
Accumulated Other Comprehensive Income (Loss), Ending Balance	[3]	$ (50)	$ (59)	$ (56)

[1] Assets and liabilities of foreign subsidiaries having non-U.S. dollar functional currencies are translated at exchange rates at the balance sheet dates and equity accounts are translated at historical spot rates. Revenues and expenses are translated at average exchange rates during the periods presented. The gains or losses resulting from translating foreign currency financial statements into U.S. dollars are included in accumulated other comprehensive income (loss). Gains or losses resulting from foreign currency transactions are included in the Consolidated Statements of Operations.

[2] These amounts represent the amortization of actuarial loss to periodic pension cost and were reclassified from accumulated other comprehensive income to the general and administrative expenses line on the statement of operations.

[3] As of December 31, 2021, the Company does not have any after-tax components of accumulated other comprehensive loss attributable to noncontrolling interests.