Stockholders' Equity (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020		Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 2,811	[1]	$ 3,117
Translation adjustment	[2]	(3)		0
Ending balance		2,744	[1]	3,106
Translation adjustment, net of tax expense (benefit)		(1)
Total Stockholders’ Accumulated Other Comprehensive Loss, net of taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(37)		(30)
Ending balance		(40)		(30)
Post-Retirement Benefit Plans, net of taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(25)		(16)
Translation adjustment		0
Ending balance		(25)		(16)
Translation Adjustment, net of taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(12)		(14)
Translation adjustment		(3)
Ending balance		$ (15)		$ (14)

[1] The Company is authorized to issue the following classes of stock: (i) 500,000,000 shares of common stock, par value $0.001 per share. At March 31, 2020 and December 31, 2019, the Company had 86,814,466 shares and 86,600,302 shares of common stock issued and outstanding, respectively; (ii) 100,000,000 shares of preferred stock, par value $0.001 per share authorized. At March 31, 2020 and December 31, 2019, no preferred stocks were issued or outstanding; and (iii) 100 shares of special stock, par value $0.001 per share, issued and outstanding to its Manager as at March 31, 2020 and December 31, 2019.

[2] Translation adjustment is presented net of tax benefit of $1 million for the quarter ended March 31, 2020. See Note 10, "Stockholders' Equity", for further discussions.