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Debt, Accounts Receivable Sales Facility and Capitalized Interest (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Credit Facilities [Member] A/R Sales Facility [Member] | Sep. 30, 2013 Credit Facilities [Member] A/R Sales Facility [Member] | Dec. 31, 2013 Credit Facilities [Member] A/R Sales Facility [Member]
Accounts Receivable Sales Facility (Textual) |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  | $ 1,500,000,000 |  |
Maturity date of accounts receivable sales facility |  |  |  |  | Jul. 31, 2015 |  |
Proceeds from accounts receivable sales facility |  |  |  |  | 0 | 0 |
Repayments under accounts receivable sales facility |  |  |  |  | 0 | 0 |
Amount outstanding |  |  |  |  | 100,000,000 |  | 100,000,000
Capitalized Interest (Textual) |  |  |  |  |  |  |
Interest costs incurred, capitalized | $ 17,000,000 | $ 16,000,000 | $ 52,000,000 | $ 101,000,000 |  |  |

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