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Long-Term Debt and Credit Facilities (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
6 Months Ended | |
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Jun. 30, 2012
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Dec. 31, 2011
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| Credit facility | $ 1,000 | |
| Expiration date | Aug. 05, 2013 | |
| Additional borrowing capacity available under all of its existing credit facilities | 1,058 | |
| Long-term debt, weighted-average interest rate | 3.03% | |
| Issuance of long-term debt, unamortized debt issuance costs | 12 | |
| Debt Instrument, Fair Value Disclosure | $ 1,861 | $ 1,837 |
| X | ||||||||||
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Date the credit facility terminates, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of long-term debt outstanding by type or by instrument at that time. No definition available.
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- Definition
The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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