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Retirement and Benefit Plans - Schedule of Estimated Future Benefit Payments (Details) - Pension Plan $ in Millions	Jun. 30, 2026 USD ($)
Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Remainder of 2026	$ 227
2027	144
2028	140
2029	140
2030	139
2031 - 2035	643
Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Remainder of 2026	18
2027	15
2028	15
2029	15
2030	14
2031 - 2035	$ 67

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Defined Benefit Plan, Estimated Future Benefit Payments, After Year Four For Next Five Years

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