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Employee Benefit Plans (Fair Values of Pension and Post Retirement Plan Assets by Asset Category) (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Preferred stock | $ 170 | $ 258
Pending sales of securities and advanced subscriptions | 177 |
Pending sales of securities |  | 35
Net accrued income | 27 | 27
Pending purchases of securities | 180 | 62
Other Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Preferred stock | 10 |
Pending sales of securities and advanced subscriptions | 10 |
Pending sales of securities |  | 5
Net accrued income | 2 | 2
Pending purchases of securities | $ 10 | $ 3

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- Definition Defined benefit plan, net accrued income. + References No definition available. + Details
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Balance Type: | credit
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- Definition Defined benefit plan, pending purchases of securities. + References No definition available. + Details
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- Definition Defined benefit plan, pending sales of securities. + References No definition available. + Details
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- Definition Defined benefit plan pending sales of securities and advanced subscriptions. + References No definition available. + Details
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- Definition Defined benefit plan preferred stock. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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