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Postretirement Health Care and Life Insurance Benefits Postretirement Health Care and Life Insurance Benefits (Estimated Postretirement Benefit Payments in Future Years) (Details) - Other Postretirement Benefits Plan [Member] $ in Millions | Feb. 01, 2020 USD ($)
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Expected Benefit [Abstract] |
2020 | $ 14
2021 | 13
2022 | 12
2023 | 11
2024 | 10
2025-2029 | 41
Expected Federal Subsidy [Abstract] |
2020 | 0
2021 | 0
2022 | 0
2023 | 0
2024 | 0
2025-2029 | $ 1

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