Comprehensive Income (Loss) (Summary of the Activity in AOCI, Net of the Related Tax Effects) (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of period		$ (18)	$ (33)
Other comprehensive income (loss) before reclassifications:
Pre-tax amount		18	5
Tax provision (benefit)		4	1
After-tax amount		14	4
Amounts reclassified from accumulated other comprehensive income (loss)	[1]	4	4
Net current period other comprehensive income (loss)		17	7
Balance at the end of period		(1)	(26)
Unrealized Loss On Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of period		(18)	(33)
Other comprehensive income (loss) before reclassifications:
Pre-tax amount		18	5
Tax provision (benefit)		4	1
After-tax amount		14	4
Amounts reclassified from accumulated other comprehensive income (loss)	[1]	4	4
Net current period other comprehensive income (loss)		17	7
Balance at the end of period		$ (1)	$ (26)

[1] Amounts are net of tax. See reclassifications out of AOCI below for further details.