INCOME TAXES - Principal Reasons for Differences and Related Tax Effects where Income Tax Expense Varies from Amount Computed by Applying Expected United States Tax Rate to Pretax Earnings (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income taxes based on U.S. statutory rates									$ 873	$ 933	$ 836
Foreign rate differential									0	229	220
Write-down of U.S. deferred tax liabilities for tax reform change									(1,411)	0	0
Other, net									(81)	(21)	7
Total income tax expense	$ 265	$ (1,303)	$ 265	$ 154	$ 276	$ 259	$ 292	$ 314	$ (619)	$ 1,141	$ 1,063