Summary of Significant Accounting Policies (Unaudited) Accumulated Other Comprehensive Income (Loss) (Details 6) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (131)	$ (140)
Accumulated Other Comprehensive Income (Loss), Other Components, Net of Tax	7	(12)
Accumulated other comprehensive loss	$ (124)	$ (152)

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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