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Income Taxes (Details 3) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Deferred tax assets: |  |
Net operating loss and capital loss carryforwards, state | $ 56 | $ 68
Net operating loss and capital loss carryforwards, foreign | 49 | 116
Retirement and other employee benefits | 2 | 14
Foreign tax credits | 57 | 55
State tax credits | 11 | 16
Other | 34 | 38
Operating lease liabilities | 66 | 63
Gross deferred tax assets | 275 | 370
Valuation allowance | (107) | (194)
Net deferred tax assets | 168 | 176
Deferred tax liabilities: |  |
Depreciation and amortization | (273) | (300)
Investments in partnerships | (659) | (780)
Operating lease right-of-use assets | (63) | (63)
Undistributed earnings | (14) | (9)
Other | (30) | (23)
Deferred tax liabilities | (1,039) | (1,175)
Net deferred tax liability | (871) | (999)
Unrecognized tax benefits: |  |
Balance as of January 1 | 222 | 181
Additions for tax positions taken during the current year | 1 | 5
Additions for tax positions taken during prior years | 7 | 69
Reductions related to lapsed statutes of limitations | 0 | 0
Reductions related to settlements with tax jurisdictions | 0 | (33)
Balance as of December 31 | $ 230 | $ 222

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