Special Charges (Credits) - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Restructuring Cost and Reserve [Line Items]
(Gains) losses on sale of assets and other special charges	$ 14	$ (8)
Nonoperating unrealized gains (losses)	$ 24	0
Debt extinguishment costs		7
Unsecured Debt
Restructuring Cost and Reserve [Line Items]
Long-term debt		$ 400
Stated interest rate		4.25%