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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Contribution Benefit Plans [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Percentage of employer contribution to match participant contribution in defined contribution plan, net | 100.00% |  |
Benefits expense of defined benefit plans | $ 659 | $ 606 | $ 560
Defined benefit plan cost (credit) | 2 | (11) | 4
Defined benefit plan, assets | $ 43 | 9 |
Defined Contribution Benefit Plans [Member] | Minimum [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Percentage of employer contribution to match participant contribution in defined contribution plan | 3.00% |  |
Defined Contribution Benefit Plans [Member] | Maximum [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Percentage of employer contribution to match participant contribution in defined contribution plan | 9.00% |  |
Restoration Plan [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Number of hours of service required to qualify for the plan | 1,000 or more |  |
Noncontributory and nonqualified plan, benefit expense | $ 40 | (27) | 38
Noncontributory and nonqualified plan, accrued benefits liabilities | 227 | 210 |
Supplemental Executive Retirement Plan [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Defined benefit plan cost (credit) | 10 | 22 | $ 22
Defined benefit plan obligation | $ 106 | $ 137 |

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- Definition Defined benefit plan accumulated cost asset. + References No definition available. + Details
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- Definition No of hours of service required to qualify for the plan. + References No definition available. + Details
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- Definition Noncontributory, nonqualified plan, accumulated benefit obligation. + References No definition available. + Details
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- Definition Noncontributory, nonqualified plan, benefit cost. + References No definition available. + Details
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- Definition Pension Plans, Postretirement and Other Employee Benefits [Line Items] + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-6 + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480794/715-70-50-1 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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- Details
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- Details
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