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Employee Benefits Schedule of Net Benefit Costs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other Postretirement Benefit Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | $ 1 | $ 1 | $ 2
Interest cost on benefit obligation | 2 | 2 | 2
Expected return on plan assets | (1) | (2) | (2)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 0 | 0 | (1)
Amortization of net actuarial loss | (1) | 0 | 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | (1) | (11) |
Net periodic benefit cost | 0 | (10) | 1
Pension Plans, Defined Benefit [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 10 | 17 | 19
Interest cost on benefit obligation | 37 | 28 | 27
Expected return on plan assets | (43) | (46) | (45)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (1) | (2) | 0
Amortization of net actuarial loss | 0 | 15 | 22
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 0
Net periodic benefit cost | 3 | 12 | 23
Non Qualified Benefit Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost | 0 | 0 | 0
Interest cost on benefit obligation | 1 | 1 | 1
Expected return on plan assets | 0 | 0 | 0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 0 | 0 | 0
Amortization of net actuarial loss | 1 | 1 | 1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 0
Net periodic benefit cost | $ 2 | $ 2 | $ 2

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