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v3.6.0.2

Rate Matters and Regulation (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($)
Additional Requested Plant Dismantlement Cost | $ 8.0
Change in Requested Return on Equity | 0.25%
Change in Requested Rate Increase | $ 9.0
Administrative Law Judge [Member] |
Recommended Return on Equity | 9.87%
Recommended Increase (Decrease) in Revenue | $ 40.7
Recommended Capital Structure, Equity Percentage | 53.00%
Recommended Capital Structure, Debt Percentage | 47.00%
Oklahoma Corporation Commission [Member] |
OG&E's Jurisdictional Revenues | 86.00%
Arkansas Public Service Commission [Member] |
OG&E's Jurisdictional Revenues | 8.00%
Federal Energy Regulatory Commission [Member] |
OG&E's Jurisdictional Revenues | 6.00%
Oklahoma Public Utility Division Staff [Member] |
Recommended Return on Equity | 9.25%
Reduction to Requested Additional Plant Dismantlement Costs | $ 33.0
Recommended Rate Increase (Decrease) | $ 6.1
Recommended Common Equity Percentage | 53.00%
Oklahoma Attorney General [Member] |
Reduction to Requested Additional Plant Dismantlement Costs | $ 20.9
Oklahoma Industrial Electric Consumers [Member] |
Recommended Return on Equity | 9.00%
Reduction to Requested Additional Plant Dismantlement Costs | $ 52.5
Recommended Rate Increase (Decrease) | $ (47.9)
Recommended Common Equity Percentage | 53.00%
SmartHours Program [Member] |
Lost Revenue Associated with Customer Programs - recovered annually | $ 10.1
Lost Revenue Associated with Customer Programs | 30.3
Amount Recorded for Lost Revenue Associated with Customer Programs | 36.6
Dry Scrubber Project [Member] |
Estimated Environmental Capital Costs | 547.5
Public Utilities, Property, Plant and Equipment, Construction Work in Progress | 208.7
Mustang Modernization [Member] |
Estimated Environmental Capital Costs | 424.9
Public Utilities, Property, Plant and Equipment, Construction Work in Progress | $ 187.8
OKLAHOMA |
Public Utilities, Requested Equity Capital Structure, Percentage | 53.00%
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 92.5
Public Utilities, Requested Return on Equity, Percentage | 10.25%
Investments Since Last Rate Case | $ 1,600.0
Public Utilities, Interim Rate Increase (Decrease), Amount | 69.5
Interim Rate Collected | 39.0
Interim Rate Revenue Reserved | 33.7
ARKANSAS |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 16.5
Public Utilities, Requested Return on Equity, Percentage | 10.25%
Investments Since Last Rate Case | $ 3,000.0
Change in Allowed Amount [Member] | SmartHours Program [Member] |
Lost Revenue Associated with Customer Programs | $ (6.3)
Recommendation 1 [Member] | Oklahoma Attorney General [Member] |
Recommended Return on Equity | 9.25%
Recommended Rate Increase (Decrease) | $ (10.8)
Recommended Common Equity Percentage | 50.00%
Recommendation 2 [Member] | Oklahoma Attorney General [Member] |
Recommended Return on Equity | 8.90%
Recommended Rate Increase (Decrease) | $ (13.7)
Recommended Common Equity Percentage | 53.00%

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