CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Comprehensive income:
Net income	$ 93	$ 132	$ 307	$ 308
Pension and retiree medical benefits:
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax	0	0	1	0
Total comprehensive income	93	132	308	308
Total other comprehensive income	$ 0	$ 0	$ 1	$ 0