v2.4.0.6

Derivative Instruments (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 MMBTU MW | Dec. 31, 2011 MW MMBTU
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Derivative Instruments [Abstract] |  |  |  |
Nonmonetary Notional Amount of Price Risk Derivatives Power | (16) |  | (21) |
Price Risk Derivatives [Abstract] |  |  |  |
Natural gas (MMBtu) | 66 |  | (200) |
Interest rate swaps | $ 1,602 | [1] | $ 5,639 | [1]
[1] | Approximately $4.1 billion at December 31, 2011 was related to hedges of our First Lien Credit Facility’s variable rate debt that was converted to fixed rate debt. On March 26, 2012, we terminated the interest rate swaps formerly hedging our First Lien Credit Facility

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- Definition Nonmonetary Notional Amount of Price Risk Derivatives Natural Gas + References No definition available. + Details
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- Definition Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 + Details
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