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INCOME TAXES - Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense	$ 241	$ 460	$ 462
Tax effect of changes in OCI	112	225	(96)
Total comprehensive income tax expense	$ 353	$ 685	$ 366

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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