Summary of Significant Accounting Policies (Unaudited) Accumulated Other Comprehensive Income (Loss) (Details 5) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (133)	$ (131)
Accumulated Other Comprehensive Income (Loss), Other Components, Net of Tax	2	5
Accumulated other comprehensive loss	$ (131)	$ (126)