SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for doubtful accounts
Valuation and qualifying accounts
Balance at Beginning of Period	$ 904	$ 867	$ 822
Charged to Costs and Expenses	(235)	37	56
Charged to Other Accounts	0	0	(11)
Deductions	(625)	0	0
Balance at End of Period	44	904	867
Valuation allowance and reserves, current	43	44	46
Environmental, litigation, tax and other reserves
Valuation and qualifying accounts
Balance at Beginning of Period	3,712	3,164	2,429
Charged to Costs and Expenses	328	714	900
Charged to Other Accounts	50	138	94
Deductions	(297)	(304)	(259)
Balance at End of Period	3,793	3,712	3,164
Environmental litigation tax and other reserves, current	$ 215	$ 266	$ 790