v3.25.0.1

Other Income, Net (Details) - USD ($) $ in Millions	12 Months Ended
Other Income, Net (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Income and Expenses [Abstract]
Non-service components of net periodic benefit costs	Other income, net	Other income, net	Other income, net
AFUDC - Equity	$ 46.0	$ 41.0	$ 18.8
Non-service components of net periodic benefit costs	24.3	24.1	33.8
Interest income	9.8	1.1	0.1
Other, net	(1.1)	2.6	(3.3)
Other income, net	$ 79.0	$ 68.8	$ 49.4

Indicates line item in statement of income or comprehensive income that includes components of net periodic benefit cost (credit), excluding service cost component, for defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (h)
-Publisher FASB
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- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
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- Definition

Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
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- References

No definition available.

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- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

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- Definition

The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets.

+ References

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- Definition

Amount of unclassified other income (expense) related to nonoperating activities.

+ References

No definition available.

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