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Employee Benefit Plans (Schedule of Estimated Future Employer Contributions) (Details) $ in Millions | Dec. 31, 2021 USD ($)
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Qualified Plan |  |
2022 | $ 215 |
2023 | 147 |
2024 | 148 |
2025 | 144 |
2026 | 144 |
2027 - 2031 | 687 |
Non-Qualified Plan |  |
2022 | 14 |
2023 | 14 |
2024 | 14 |
2025 | 14 |
2026 | 14 |
2027 - 2031 | 68 |
Postretirement Benefit Plan |  |
2022 | 4 | [1]
2023 | 4 | [1]
2024 | 3 | [1]
2025 | 3 | [1]
2026 | 3 | [1]
2027 - 2031 | $ 9 | [1]
[1] | Estimated benefit payments in the postretirement benefit plan are net of estimated Medicare subsidies.

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