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RETIREMENT BENEFITS PLANS - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items] |  |
United States pension plans percentage of worldwide pension assets | 59.00% |
United Kingdom pension plans percentage of worldwide pension assets | 26.00% |
United States pension plans' target allocation of United States equities | 21.00% |
United States pension plans' target allocation of non-United States equities | 11.00% |
United States pension plans' target allocation of real estate | 4.00% |
United State pension plans' target allocation of debt securities | 46.00% |
United States pension plans' target allocation of other, including private equity, private debt, and cash equivalents | 18.00% |
United Kingdom pension plans' target allocation of equities | 16.00% |
Total pension plan assets | $ 4,191 | $ 3,993
Pending purchases and sales of plan assets, and interest receivable | (67) | (85)
Unfunded commitments | 158 | 128
Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 485 | 662
Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 1,999 | 1,952
Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 485 | 486
Non-United States equity and global equities | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 211 | 241
Non-United States equity and global equities | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Non-United States equity and global equities | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 211 | 241
Non-United States equity and global equities | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Fixed income | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 32 | 28
Fixed income | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Fixed income | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 32 | 28
Fixed income | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Fixed income securities | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 1,647 | 1,582
Fixed income securities | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Fixed income securities | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 1,647 | 1,582
Fixed income securities | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
United States treasuries | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 258 | 461
United States treasuries | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 255 | 453
United States treasuries | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 3 | 8
United States treasuries | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Real estate | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 248 | 212
Real estate | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 100 | 63
Real estate | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 32 | 25
Real estate | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 116 | 124
Cash equivalents | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 49 | 83
Cash equivalents | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 25 | 55
Cash equivalents | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 24 | 28
Cash equivalents | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Exchange traded funds | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 105 | 91
Exchange traded funds | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 105 | 91
Exchange traded funds | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Exchange traded funds | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Other | Fair Value, Inputs, Level 1, 2 and 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 419 | 402
Other | Quoted prices in active markets for identical assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 0 | 0
Other | Other observable inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 50 | 40
Other | Unobservable inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 369 | 362
Common collective and other trusts measured at net asset value | Fair Value Measured at Net Asset Value Per Share |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | 1,287 | $ 978
Money market funds measured at net asset value | Fair Value Measured at Net Asset Value Per Share |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total pension plan assets | $ 2 |

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