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Retirement Benefits Plans Retirement Benefits Plans - Fair Value of Other Postretirement Benefits Plan Assets (Details 12) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Fair Value of Other Postretirement Benefits Plan Assets [Line Items] |  |
Global equities | $ 70 | $ 75
Fixed income securities | 29 | 29
United States treasuries | 38 | 38
Cash equivalents | 1 | 4
Total other postretirement benefits plan assets | 138 | 146
Quoted prices in active markets for identical assets (Level 1) [Member] |  |
Fair Value of Other Postretirement Benefits Plan Assets [Line Items] |  |
Global equities | 0 | 0
Fixed income securities | 0 | 0
United States treasuries | 38 | 38
Cash equivalents | 1 | 4
Total other postretirement benefits plan assets | 39 | 42
Other observable inputs (Level 2) [Member] |  |
Fair Value of Other Postretirement Benefits Plan Assets [Line Items] |  |
Global equities | 70 | 75
Fixed income securities | 29 | 29
United States treasuries | 0 | 0
Cash equivalents | 0 | 0
Total other postretirement benefits plan assets | 99 | 104
Unobservable inputs (Level 3) [Member] |  |
Fair Value of Other Postretirement Benefits Plan Assets [Line Items] |  |
Global equities | 0 | 0
Fixed income securities | 0 | 0
United States treasuries | 0 | 0
Cash equivalents | 0 | 0
Total other postretirement benefits plan assets | $ 0 | $ 0

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- Definition Cash Equivalents Fair Value of Postretirement Benefits Plan Assets + References No definition available. + Details
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- Definition Fair Value of Other Postretirement Benefits Plan Assets + References No definition available. + Details
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- Definition Fair Value of Other Postretirement Benefits Plan Assets - Fixed Income Securities + References No definition available. + Details
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- Definition Global Securities Fair Value of other postretirement benefits + References No definition available. + Details
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- Definition Fair Value of Other Postretirement Benefits Plan Assets - United States Treasuries + References No definition available. + Details
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