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Retirement Plans (Amounts Recognized As A Component Of AOCI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Pension [Member]
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Accumulated other comprehensive loss (gain) at beginning of the period
Accumulated other comprehensive loss (gain) at end of the period
OPEB [Member]
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Accumulated other comprehensive loss (gain) at beginning of the period	(125)	(102)
Prior service (cost) credit amortized during the period	25	22
Prior service cost (credit) occurring during the period		(45)
Net amount recognized in comprehensive (loss) for the period	25	(23)
Accumulated other comprehensive loss (gain) at end of the period	$ (100)	$ (125)

X

- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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X

- References

No definition available.

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X

- Definition

Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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X

- Definition

Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

+ References

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- Definition

Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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