Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

:


						Three Months Ended June 30, 2025
(Millions of Dollars)						Regulated electric utility						Regulated natural gas utility						Total segments
Operating revenues (a)						$	253					$	24					$	277


Electric fuel and purchased power						103						—						103
Cost of natural gas sold and transported						—						9						9
O&M expenses						52						8						60
Depreciation and amortization						42						8						50
Other segment expenses, net						5						1						6
Interest charges and financing costs						13						2						15
Income tax expense (benefit)						9						(1)						8
Net income (loss)						$	29					$	(3)					$	26

(a)Operating revenues include $55 million of affiliate electric revenue.


						Three Months Ended June 30, 2024
(Millions of Dollars)						Regulated electric utility						Regulated natural gas utility						Total segments
Operating revenues (a)						$	246					$	21					$	267


Electric fuel and purchased power						105						—						105
Cost of natural gas sold and transported						—						7						7
O&M expenses						52						7						59
Depreciation and amortization						39						7						46
Other segment expenses, net						7						—						7
Interest charges and financing costs						13						2						15
Income tax expense						7						—						7
Net income (loss)						$	23					$	(2)					$	21

Total segment net income																		$	21
Non-segment net income																		2
Consolidated net income																		$	23

(a)Operating revenues include $54 million of affiliate electric revenue.


						Six Months Ended June 30, 2025
(Millions of Dollars)						Regulated electric utility						Regulated natural gas utility						Total segments
Operating revenues (a)						$	512					$	92					$	604


Electric fuel and purchased power						209						—						209
Cost of natural gas sold and transported						—						42						42
O&M expenses						106						17						123
Depreciation and amortization						84						15						99
Other segment expenses, net						11						1						12
Interest charges and financing costs						28						3						31
Income tax expense						16						4						20
Net income						$	58					$	10					$	68

(a)Operating revenues include $111 million of affiliate electric revenue.


						Six Months Ended June 30, 2024
(Millions of Dollars)						Regulated electric utility						Regulated natural gas utility						Total segments
Operating revenues (a)						$	502					$	75					$	577


Electric fuel and purchased power						212						—						212
Cost of natural gas sold and transported						—						31						31
O&M expenses						101						14						115
Depreciation and amortization						76						15						91
Other segment expenses, net						15						1						16
Interest charges and financing costs						25						3						28
Income tax expense						17						3						20
Net income						$	56					$	8					$	64

Total segment net income																		$	64
Non-segment net income																		2
Consolidated net income																		$	66

(a)Operating revenues include $107 million of affiliate electric revenue.