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Employee Benefit Plans - Additional Information (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of non-matching employer's contribution to eligible participants (as a percent) | 1.00% |
Employer's Common stock held under 401 (k) plan (in shares) | 5.6 |
Market value of employer's Common stock held under 401 (k) plan | $ 282 |
Cash dividend received on employer's common stock held under 401 (k) plan | 11 |
Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Prior service (credit) cost | (30) |
Accumulated other comprehensive income, unrecognized actuarial losses | 235 |
Projected benefit obligation with projected benefit obligations | 1,400 | $ 1,500
Accumulated benefit obligation with projected benefit obligations | 1,400 | 1,500
Fair value of plan assets for pension plans with projected benefit obligations | 1,000 | $ 1,000
Contributions and expected future benefit payments | 25 |
Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Prior service (credit) cost | 1 |
Accumulated other comprehensive income, unrecognized actuarial losses | $ 15 |
Increase in annual rate | 8.70% |
Annual rate for per capita cost of covered health care benefits assumed for 2031 and thereafter (as a percent) | 4.50% |
Contributions and expected future benefit payments | $ 13 |
Minimum | Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Amortization period of actuarial gains and losses | 4 years |
Minimum | Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Amortization period of actuarial gains and losses | 5 years |
Maximum | Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Amortization period of actuarial gains and losses | 27 years |
Maximum | Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Amortization period of actuarial gains and losses | 18 years |

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- Definition Percentage of pay of non-matching employer's contribution to eligible participants of the 401(k) plan. + References No definition available. + Details
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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