Organization, Consolidation and Presentation of Financial Statements - Immaterial Revision of Prior Period (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings	$ 9,876	$ 11,054
Assets	(21,695)	(22,838)
Net Income (Loss)	$ 1,165	1,542	$ (1,943)
Revision of Prior Period, Error Correction, Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings		46
Liabilities		27
Assets		19
Revision of Prior Period, Error Correction, Adjustment | Maximum
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Income (Loss)		$ 14	$ 14