INCOME TAXES - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
U.S. federal	$ 377	$ 323	$ 271
State and local	102	73	94
Total	479	396	365
Deferred
U.S. federal	(181)	64	90
State and local	(57)	0	7
Total	(238)	64	97
U.S. federal	196	387	361
State and local	45	73	101
Income tax expense	$ 241	$ 460	$ 462

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