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BASIS OF PRESENTATION Operating Leases (Details) - USD ($) $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 01, 2020 | Dec. 31, 2023 | Dec. 31, 2020 | Sep. 30, 2019 | Jan. 02, 2019 | Jan. 01, 2019
Operating Leased Assets [Line Items] |  |  |  |  |  |
Cumulative effect of change in accounting standards |  |  |  |  | $ 17 | $ 5
Operating lease right-of-use assets |  |  |  | $ 712 |  |
Operating lease liabilities |  |  |  | $ 733 |  |
Accounting Standards Update 2016-02 |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  |  | 734
Operating lease liabilities |  |  |  |  |  | 749
Retained Earnings |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |
Cumulative effect of change in accounting standards |  |  |  |  | $ 12 |
Retained Earnings | Accounting Standards Update 2016-02 |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |
Cumulative effect of change in accounting standards |  |  |  |  |  | $ 12
Scenario, Forecast | Accounting Standards Update 2016-13 |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |
Capital impact phase in percentage | 25.00% |  |  |  |  |
Scenario, Forecast | Minimum | Accounting Standards Update 2016-13 |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |
Increase in overall ACL | 30.00% |  |  |  |  |
Basis point change in CET1 |  | 0.22% | 0.05% |  |  |
Scenario, Forecast | Maximum | Accounting Standards Update 2016-13 |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |
Increase in overall ACL | 35.00% |  |  |  |  |
Basis point change in CET1 |  | 0.25% | 0.06% |  |  |

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