CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Postretirement benefits:
Net actuarial gain (loss), income taxes (less than)	$ 3	$ 1	$ 1
Amortization of prior service cost, income taxes (less than)	1	$ 1	$ 1
Plan amendment, income taxes (less than)	$ 1