Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]

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

(In millions)	2021		2022		2023		2024		2025		Total
Purchase obligations and commitments:
Minimum purchase commitments	$	72.5	$	50.4	$	50.4	$	36.7	$	25.9	$	235.9
Expected wind purchase commitments	55.2		55.6		56.0		56.6		56.9		280.3
Long-term service agreement commitments	2.4		2.4		7.9		35.1		31.2		79.0
Total purchase obligations and commitments	$	130.1	$	108.4	$	114.3	$	128.4	$	114.0	$	595.2

Schedule of Wind Power Purchases [Table Text Block]

The following table presents OG&E's wind power purchase 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, 2020, 2019 and 2018. 

Year Ended December 31 (In millions)	2020		2019		2018
CPV Keenan	$	27.5	$	27.2	$	27.0
Edison Mission Energy	22.8		23.1		21.7
NextEra Energy	7.0		7.4		6.8
FPL Energy (A)	—		—		2.1
Total wind power purchased	$	57.3	$	57.7	$	57.6

(A)OG&E's purchased power contract with FPL Energy for 50 MWs expired in 2018.