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Pension and Other Postretirement Benefits - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)
Pension
Defined Benefit Plan Disclosure [Line Items]
Expected current year company contributions	$ 24
Contributions	14
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected current year company contributions	31
Contributions	$ 6

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