v2.4.0.6

Related Party Transactions Affiliated Balances (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Related party balances [Line Items] |  |
Related party, accounts receivable, net of allowance | $ 15 | $ 25
Related party assets held for sale | 0 | 114
Related party, other current assets | 5 | 14
Related Party Deferred Charges and Other Assets | 48 | 48
Related party assets | 68 | 201
Notes Payable, Related Parties, Current | 5 | 5
Notes Payable, Related Parties, Noncurrent | 172 | 173
Accounts Payable, Related Parties, Current | 7 | 11
Long-term Debt, Current Maturities | 2,876 | 2,401
Due to Related Parties, Current | 184 | 189
EPB [Member] | WYCO Development L.L.C. [Member] |  |
Related party balances [Line Items] |  |
Long-term Debt, Current Maturities | $ 5 |

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