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Revenue (Tables)
 9 Months Ended
Sep. 30, 2025
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue

The following tables depict the disaggregation of revenue, including intercompany revenue, from contracts with customers by customer type and timing of revenue recognition for each of the reportable segments for the three and nine months ended September 30, 2025, and 2024. Sales tax and other similar taxes are excluded from revenues.

 

Three Months Ended September 30, 2025

Electric Utilities

 

Gas Utilities

 

Inter-segment Eliminations

 

Total

 

Customer types:

(in millions)

 

Retail

$

201.3

 

$

128.6

 

$

—

 

$

329.9

 

Transportation

 

—

 

 

43.6

 

 

(0.1

)

 

43.5

 

Wholesale

 

5.5

 

 

—

 

 

—

 

 

5.5

 

Market - off-system sales

 

16.3

 

 

—

 

 

—

 

 

16.3

 

Transmission

 

11.1

 

 

0.1

 

 

—

 

 

11.2

 

Other revenues

 

14.6

 

 

10.2

 

 

(3.8

)

 

21.0

 

Revenue from contracts with customers

$

248.8

 

$

182.5

 

$

(3.9

)

$

427.4

 

Alternative revenue and other

 

0.9

 

 

1.9

 

 

—

 

 

2.8

 

Total revenues

$

249.7

 

$

184.4

 

$

(3.9

)

$

430.2

 

 

 

 

 

 

 

 

 

Timing of revenue recognition:

 

 

 

 

 

 

 

 

Services transferred at a point in time

$

8.8

 

$

—

 

$

—

 

$

8.8

 

Services transferred over time

 

240.0

 

 

182.5

 

 

(3.9

)

 

418.6

 

Revenue from contracts with customers

$

248.8

 

$

182.5

 

$

(3.9

)

$

427.4

 

 

Three Months Ended September 30, 2024

Electric Utilities

 

Gas Utilities

 

Inter-segment Eliminations

 

Total

 

Customer types:

(in millions)

 

Retail

$

186.3

 

$

117.5

 

$

—

 

$

303.8

 

Transportation

 

—

 

 

43.2

 

 

—

 

 

43.2

 

Wholesale

 

6.1

 

 

—

 

 

—

 

 

6.1

 

Market - off-system sales

 

10.7

 

 

—

 

 

—

 

 

10.7

 

Transmission

 

13.6

 

 

—

 

 

—

 

 

13.6

 

Other revenues

 

14.9

 

 

10.8

 

 

(4.5

)

 

21.2

 

Revenue from contracts with customers

$

231.6

 

$

171.5

 

$

(4.5

)

$

398.6

 

Alternative revenue and other

 

0.9

 

 

2.1

 

 

—

 

 

3.0

 

Total revenues

$

232.5

 

$

173.6

 

$

(4.5

)

$

401.6

 

 

 

 

 

 

 

 

 

Timing of revenue recognition:

 

 

 

 

 

 

 

 

Services transferred at a point in time

$

9.3

 

$

—

 

$

—

 

$

9.3

 

Services transferred over time

 

222.3

 

 

171.5

 

 

(4.5

)

 

389.3

 

Revenue from contracts with customers

$

231.6

 

$

171.5

 

$

(4.5

)

$

398.6

 

 

 

Nine Months Ended September 30, 2025

Electric Utilities

 

Gas Utilities

 

Inter-segment Eliminations

 

Total

 

Customer types:

(in millions)

 

Retail

$

570.6

 

$

797.0

 

$

—

 

$

1,367.6

 

Transportation

 

—

 

 

143.4

 

 

(0.3

)

 

143.1

 

Wholesale

 

16.9

 

 

—

 

 

—

 

 

16.9

 

Market - off-system sales

 

38.3

 

 

0.1

 

 

—

 

 

38.4

 

Transmission

 

33.3

 

 

0.3

 

 

—

 

 

33.6

 

Other revenues

 

43.9

 

 

31.5

 

 

(11.4

)

 

64.0

 

Revenue from contracts with customers

$

703.0

 

$

972.3

 

$

(11.7

)

$

1,663.6

 

Alternative revenue and other

 

3.3

 

 

7.6

 

 

—

 

 

10.9

 

Total revenues

$

706.3

 

$

979.9

 

$

(11.7

)

$

1,674.5

 

 

 

 

 

 

 

 

 

Timing of revenue recognition:

 

 

 

 

 

 

 

 

Services transferred at a point in time

$

25.9

 

$

—

 

$

—

 

$

25.9

 

Services transferred over time

 

677.1

 

 

972.3

 

 

(11.7

)

 

1,637.7

 

Revenue from contracts with customers

$

703.0

 

$

972.3

 

$

(11.7

)

$

1,663.6

 

 

Nine Months Ended September 30, 2024

Electric Utilities

 

Gas Utilities

 

Inter-segment Eliminations

 

Total

 

Customer types:

(in millions)

 

Retail

$

529.4

 

$

707.8

 

$

—

 

$

1,237.2

 

Transportation

 

—

 

 

130.9

 

 

—

 

 

130.9

 

Wholesale

 

21.1

 

 

—

 

 

—

 

 

21.1

 

Market - off-system sales

 

22.8

 

 

—

 

 

—

 

 

22.8

 

Transmission

 

39.1

 

 

0.4

 

 

—

 

 

39.5

 

Other revenues

 

43.3

 

 

31.6

 

 

(13.4

)

 

61.5

 

Revenue from contracts with customers

$

655.7

 

$

870.7

 

$

(13.4

)

$

1,513.0

 

Alternative revenue and other

 

4.1

 

 

13.5

 

 

—

 

 

17.6

 

Total revenues

$

659.8

 

$

884.2

 

$

(13.4

)

$

1,530.6

 

 

 

 

 

 

 

 

 

Timing of revenue recognition:

 

 

 

 

 

 

 

 

Services transferred at a point in time

$

25.9

 

$

—

 

$

—

 

$

25.9

 

Services transferred over time

 

629.8

 

 

870.7

 

 

(13.4

)

 

1,487.1

 

Revenue from contracts with customers

$

655.7

 

$

870.7

 

$

(13.4

)

$

1,513.0