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Rate Matters and Regulation Rate Matters and Regulation (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 5.2
Estimated Refund to SPP	13.0
Investment in Grid Enhancement	800.0
Arkansas Environmental Refund	5.1
Impact to Company [Member]
Estimated Refund to SPP	5.0
Customer Impact [Member]
Estimated Refund to SPP	$ 8.0

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- Definition

Arkansas Environmental Refund

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Estimated Refund to SPP

+ References

No definition available.

+ Details

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Namespace Prefix:	oge_
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- Definition

Investment in Grid Enhancement

+ References

No definition available.

+ Details

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Namespace Prefix:	oge_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

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- Details

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- Details

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