Income Tax (Provision for Income Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Current:
Federal	$ (48)	$ (39)	$ (5)
State and local	2	0	0
Subtotal	(46)	(39)	(5)
Deferred:
Federal	19	24	(378)
Current and Deferred:
Provision for income tax expense (benefit)	$ (27)	$ (15)	$ (383)