Comprehensive Income (Loss) (Summary of the Activity in AOCI, Net of the Related Tax Effects) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period		$ 6
Other comprehensive income (loss) before reclassifications:
Net current period other comprehensive income (loss)		(6)	$ (3)	$ 27
Balance at end of period		0	6
Unrealized Gain (Loss) On Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period		6	8
Other comprehensive income (loss) before reclassifications:
Pre-tax amount		0	4
Tax provision (benefit)		0	1
After-tax amount		0	3
Amounts reclassified from AOCI	[1]	(6)	(5)
Net current period other comprehensive income (loss)		(6)	(3)
Balance at end of period		$ 0	$ 6	$ 8

[1] Amounts are net of income taxes. See the table below on reclassifications out of AOCI for additional information.