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Pension and Other Retiree Benefits - Assumed Health Care Cost Trend Rates (Details) - Post-retirement	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next year	9.00%	10.00%	9.00%
Rate that the cost trend rate is assumed to decline (the ultimate trend rate)	8.00%	8.00%	7.00%
Year that the rate reaches the ultimate trend rate	2031	2031	2031

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Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

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Ultimate trend rate for health care cost for defined benefit postretirement plan.

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Year ultimate health care cost trend rate is expected to be reached, in YYYY format.

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