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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 |  |  |

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