INCOME TAXES - NARRATIVE (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Worldwide effective tax rate		25.00%	14.00%	243.00%
Total deferred tax assets, after valuation allowances		$ 3,474,000,000	$ 4,345,000,000
Total deferred tax liabilities		10,476,000,000	11,402,000,000
General business credit carryforwards		698,000,000	607,000,000
Foreign tax credit carryforwards		3,904,000,000	4,465,000,000
Interest expense carryforward		28,000,000	668,000,000
Deferred foreign tax liability due to reversal of indefinite re-investment assertion		916,000,000
Additional deferred tax liability amount required		219,000,000
Unrecognized tax benefits		2,026,000,000	2,045,000,000	$ 2,173,000,000	$ 0
Potential benefit		2,000,000,000
Potential benefit, if recognized, would affect the effective tax rate on income		1,600,000,000
Benefits related to tax positions which ultimate deductibility is highly certain		60,000,000
Interest related to liabilities for unrecognized tax benefits		58,000,000
Cumulative accrued interest related to liabilities for unrecognized tax benefits		321,000,000
Interest and penalties associated with liabilities for unrecognized tax benefits		0	0
Forecast
Income Tax Contingency [Line Items]
One-time non-cash tax benefit as a result of a legal entity reorganization	$ 2,600,000,000
Other current assets
Income Tax Contingency [Line Items]
Income tax receivables		105,000,000	110,000,000
Long-term receivables and other assets, net
Income Tax Contingency [Line Items]
Federal alternative minimum tax non-current receivables		33,000,000	$ 24,000,000
State
Income Tax Contingency [Line Items]
Tax credit carryforwards		39,000,000
Tax credit carryforward, valuation allowance		34,000,000
Operating loss carryforwards		284,000,000
Operating loss carryforward, valuation allowance		244,000,000
Interest expense carryforward		9,000,000
Foreign
Income Tax Contingency [Line Items]
Tax credit carryforward, valuation allowance		3,900,000,000
Operating loss carryforwards		833,000,000
Operating loss carryforward, valuation allowance		797,000,000
Valuation allowance on other deferred tax assets		145,000,000
Federal
Income Tax Contingency [Line Items]
General business credit carryforwards		659,000,000
Operating loss carryforwards		511,000,000
Interest expense carryforward		$ 28,000,000