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Fair Value Measurements Other Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2013
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Dec. 31, 2012
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| Fair Value Disclosures [Abstract] | ||
| Carrying value of long-term debt and current portion of long-term debt | $ 9,644 | $ 10,076 |
| Fair value of long-term debt and current portion of long-term debt | $ 9,821 | $ 10,793 |
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- Definition
Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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