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Rate Matters (Details) (Wholesale Electric Rate Complaint [Member], Federal Energy Regulatory Commission (FERC) [Member], USD $)
In Millions, unless otherwise specified |
Apr. 30, 2012
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Wholesale Electric Rate Complaint [Member] | Federal Energy Regulatory Commission (FERC) [Member]
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| Rate Matters [Abstract] | |
| Entity's base percent return on equity charged to Golden Spread Electric Cooperative, Inc. through production formula rates (in hundredths) | 10.25% |
| Entity's base percent return on equity charged to Golden Spread Electric Cooperative, Inc. through transmission formula rates (in hundredths) | 10.77% |
| Entity's base percent return on equity requested by Golden Spread Electric Cooperative, Inc. (in hundredths) | 9.15% |
| Golden Spread Electric Cooperative, Inc.'s original requested amount of increase (decrease) to existing rates | $ (3.3) |
| Entity's basis point incentive added to base percent return on equity for transmission formula rates (in hundredths) | 0.50% |