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Pension and Postretirement Benefit Plans - Narrative (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2023 USD ($)
Qualified and Non-qualified Pension Benefits |
Schedule Of Defined Contribution Plans Disclosures |
Company contributions | $ 53
Postretirement Benefits |
Schedule Of Defined Contribution Plans Disclosures |
Company contributions | $ 4

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