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Employee Benefits - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
401(k) plan contributions by employer |  | $ 21,000,000 | $ 7,000,000 |
Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Discount rate |  | 470.00% | 490.00% |
Expected rate of return on plan assets |  | 6.30% | 6.00% | 6.30%
Compensation increase percentage |  | 2.50% |  |
Amortization of actuarial gain (loss) |  | $ 7,000,000 | $ 2,000,000 |
Amortization of prior service cost |  |  | 0 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | (2,000,000) | (10,000,000) | $ (5,000,000)
Actuarial gain |  | 2,000,000 | $ (38,000,000) |
Defined Benefit Plan, Expected Amortization, Next Fiscal Year |  | 3,000,000 |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year One |  | $ 8,000,000 |  |
Pension Plan | Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term inflation rate |  | 5.00% |  |
Pension Plan | Minimum | Equity securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected rate of return on plan assets |  | 6.00% |  |
Pension Plan | Minimum | Fixed income securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected rate of return on plan assets |  | 3.00% |  |
Pension Plan | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term inflation rate |  | 7.00% |  |
Pension Plan | Maximum | Equity securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected rate of return on plan assets |  | 8.00% |  |
Pension Plan | Maximum | Fixed income securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected rate of return on plan assets |  | 5.00% |  |
Health & Welfare Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Discount rate |  | 4.60% | 480.00% |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | $ 1,000,000 | $ 1,000,000 |
Health & Welfare Plan | Forecast |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 1,000,000 |  |  |
Post-Retirement Health and Welfare Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Amortization of actuarial gain (loss) |  |  | 0 |
Amortization of prior service cost |  |  | 0 |
Actuarial gain |  | 1,000,000 | $ (2,000,000) |
Defined Benefit Plan, Expected Future Benefit Payment, Year One |  | $ 1,000,000 |  |

X
- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate of return on plan assets, used to determine net periodic benefit cost (credit) of defined benefit plan, in subsequent interim measurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-8 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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