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Property, Plant and Equipment (Ownership of Coal-Fired Facilities) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 MW
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Jointly Owned Utility Plant Interests [Line Items] |
Production Capacity (MW) | 2,465
Beckjord Unit 6 |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership | 50.00%
Production Capacity (MW) | 207
Gross Plant In Service | $ 2
Accumulated Depreciation | 1
Construction Work In Process | 0
Conesville Unit 4 |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership | 17.00%
Production Capacity (MW) | 129
Gross Plant In Service | 24
Accumulated Depreciation | 0
Construction Work In Process | 0
East Bend Station |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership | 31.00%
Production Capacity (MW) | 186
Gross Plant In Service | 12
Accumulated Depreciation | 5
Construction Work In Process | 0
Killen Station |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership | 67.00%
Production Capacity (MW) | 402
Gross Plant In Service | 306
Accumulated Depreciation | 9
Construction Work In Process | 4
Miami Fort Units 7 and 8 |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership | 36.00%
Production Capacity (MW) | 368
Gross Plant In Service | 212
Accumulated Depreciation | 13
Construction Work In Process | 1
Stuart Station |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership | 35.00%
Production Capacity (MW) | 808
Gross Plant In Service | 205
Accumulated Depreciation | 12
Construction Work In Process | 16
Zimmer Station |
Jointly Owned Utility Plant Interests [Line Items] |
Ownership | 28.00%
Production Capacity (MW) | 365
Gross Plant In Service | 177
Accumulated Depreciation | 25
Construction Work In Process | 3
Transmission |
Jointly Owned Utility Plant Interests [Line Items] |
Gross Plant In Service | 41
Accumulated Depreciation | 4
Construction Work In Process | 0
Total Jointly Owned Plant |
Jointly Owned Utility Plant Interests [Line Items] |
Gross Plant In Service | 979
Accumulated Depreciation | 69
Construction Work In Process | $ 24

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- Definition The period end amount owned by the reporting utility of a jointly owned utility plant in service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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- Definition The period end amount of construction work in progress at a jointly owned electricity generation plant. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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- Definition The period end amount of accumulated depreciation in a jointly owned electricity generation plant. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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- Definition The proportionate share of interest (percent) in a jointly owned utility plant. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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