Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Unrecorded Unconditional Purchase Obligations Disclosure

The following table presents the Registrants' future purchase obligations and commitments estimated for the next five years.

(In millions)	2024		2025		2026		2027		2028		Total
Purchase obligations and commitments:
Minimum purchase commitments	$	118.4	$	100.5	$	69.7	$	56.9	$	46.6	$	392.1
Estimated wind power purchase commitments		56.6		56.9		57.3		57.8		58.4		287.0
Capacity commitments		32.4		33.0		40.2		41.4		—		147.0
Long-term service agreement commitments		14.8		16.6		16.6		9.9		3.0		60.9
Generation capacity construction commitments		126.5		137.8		38.3		—		—		302.6
Total purchase obligations and commitments	$	348.7	$	344.8	$	222.1	$	166.0	$	108.0	$	1,189.6

Schedule of Wind Purchased Power

The following table presents OG&E's wind purchased power contracts.

Company	Location	Original Term of Contract	Expiration of Contract	MWs
CPV Keenan	Woodward County, OK	20 years	2030		152.0
Edison Mission Energy	Dewey County, OK	20 years	2031		130.0
NextEra Energy	Blackwell, OK	20 years	2032		60.0

The following table presents a summary of OG&E's wind power purchases for the years ended December 31, 2023, 2022 and 2021.

Year Ended December 31 (In millions)	2023		2022		2021
CPV Keenan	$	23.0	$	25.8	$	27.3
Edison Mission Energy		20.5		24.9		21.7
NextEra Energy		5.3		7.3		6.8
Total wind power purchased	$	48.8	$	58.0	$	55.8