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EMPLOYEE BENEFITS (Tables)

9 Months Ended

Sep. 30, 2025

Retirement Benefits [Abstract]

Schedule of net benefit cost (credit)

The following tables show the components of net periodic benefit cost (credit) (including amounts capitalized to our balance sheets) for our benefit plans:

						Pension Benefits
						Three Months Ended September 30												Nine Months Ended September 30
(in millions)						2025						2024						2025						2024
Service cost						$	5.2					$	6.1					$	15.7					$	18.2
Interest cost						29.6						29.2						89.0						87.5
Expected return on plan assets						(43.8)						(45.5)						(131.5)						(136.6)
Loss (gain) on plan settlement						(0.7)						0.7						(0.7)						0.7
Amortization of prior service credit						—						(0.1)						(0.1)						(0.1)
Amortization of net actuarial loss						9.0						14.9						32.1						44.6
Net periodic benefit cost (credit)						$	(0.7)					$	5.3					$	4.5					$	14.3

						OPEB Benefits
						Three Months Ended September 30												Nine Months Ended September 30
(in millions)						2025						2024						2025						2024
Service cost						$	2.9					$	2.7					$	8.5					$	8.1
Interest cost						6.4						5.6						19.2						17.0
Expected return on plan assets						(13.6)						(13.2)						(40.7)						(39.5)
Amortization of prior service credit						(1.4)						(3.3)						(6.4)						(10.1)
Amortization of net actuarial gain						(2.2)						(1.9)						(5.9)						(5.7)
Net periodic benefit credit						$	(7.9)					$	(10.1)					$	(25.3)					$	(30.2)

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 715
-SubTopic 20
-Subparagraph (h)
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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