v3.25.4

Employee Benefit Plans - Fair Value of Investment Categories (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 1,423 | $ 1,392 | $ 1,507
Not Subject to Leveling | $ 119 | $ 14 |
Percentage of Plan Assets | 100.00% | 100.00% |
Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 271 | $ 319 |
Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 1,033 | 1,059 |
Cash and cash equivalents: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 28 | 20 |
Not Subject to Leveling | $ 0 | $ 0 |
Percentage of Plan Assets | 2.00% | 1.40% |
Cash and cash equivalents: | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 28 | $ 20 |
Cash and cash equivalents: | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 0 | 0 |
U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 43 |  |
Not Subject to Leveling | $ 0 |  |
Percentage of Plan Assets | 3.00% |  |
U.S. | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 0 |  |
U.S. | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 43 |  |
U.S. large companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets |  | 56 |
Not Subject to Leveling |  | $ 0 |
Percentage of Plan Assets |  | 4.00% |
U.S. large companies | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets |  | $ 0 |
U.S. large companies | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets |  | 56 |
U.S. small companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets |  | 14 |
Not Subject to Leveling |  | $ 0 |
Percentage of Plan Assets |  | 1.00% |
U.S. small companies | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets |  | $ 0 |
U.S. small companies | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets |  | 14 |
International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 31 | 54 |
Not Subject to Leveling | $ 0 | $ 7 |
Percentage of Plan Assets | 2.20% | 3.90% |
International | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 0 | $ 20 |
International | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 31 | 27 |
Fixed income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 1,305 | 1,241 |
Not Subject to Leveling | $ 119 | $ 6 |
Percentage of Plan Assets | 91.70% | 89.10% |
Fixed income securities | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 243 | $ 279 |
Fixed income securities | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 943 | 956 |
Derivatives |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | 16 | 8 |
Not Subject to Leveling | $ 0 | $ 0 |
Percentage of Plan Assets | 1.10% |  |
Derivatives |  | 0.60% |
Derivatives | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 0 | $ 0 |
Derivatives | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets | $ 16 | $ 8 |

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