INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Income tax expense (benefit)	$ 518	$ 382	$ 348
Reserve for expected increase in income tax expense	98
Legal entity restructuring tax impact	98	82	147
Cash and cash equivalents as presented in our Consolidated Balance Sheets	3,044	2,924	1,952
Operating loss carryforwards	5,800	5,900
Operating loss carryforwards, not subject to expiration	3,600
U.S. general business credit carryforwards, including Energy Tax Credits	386	680
Valuation allowance, deferred tax assets	195	214
Valuation allowance, increase in deferred tax assets	1
Unrecognized tax benefits, income tax penalties and interest expense (benefit)	14	10	(4)
Unrecognized tax benefits, income tax penalties and interest accrued	66	52	$ 42
Unrecognized tax benefits	74
United States Pension Benefits
Cash and Cash Equivalents [Line Items]
Operating loss carryforwards	306	512
Net Operating Loss Carryforward
Cash and Cash Equivalents [Line Items]
Valuation allowance, deferred tax assets	131	126
Other Deferred Tax Assets
Cash and Cash Equivalents [Line Items]
Valuation allowance, deferred tax assets	$ 64	$ 88