Income Taxes (Jurisdictional Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Income Taxes (Jurisdictional components of deferred taxes)
Deferred Tax Assets, Gross	$ 1	$ 10
Valuation allowances	(2)	(2)
Net deferred income tax assets (liabilities)	(1)	8
U.S. Federal [Member]
Income Taxes (Jurisdictional components of deferred taxes)
Operating Loss Carryforwards	1,500
Deferred Tax Assets, Gross	26	26
Valuation allowances	(1)	(1)
Net deferred income tax assets (liabilities)	25	25
State and Local Jurisdiction [Member]
Income Taxes (Jurisdictional components of deferred taxes)
Operating Loss Carryforwards	500
Deferred Tax Assets, Gross	1	1
Valuation allowances	0	0
Net deferred income tax assets (liabilities)	1	1
Foreign Tax Authority [Member]
Income Taxes (Jurisdictional components of deferred taxes)
Operating Loss Carryforwards	13
Deferred Tax Assets, Gross	(26)	(17)
Valuation allowances	(1)	(1)
Deferred Tax Liabilities, Net	(27)	$ (18)
Share-based Payment Arrangement [Member]
Income Taxes (Jurisdictional components of deferred taxes)
Operating Loss Carryforwards	$ 237