| **Fair Value Measurements (Fair Value of Life Policy) (Details) (USD $)In Millions, unless otherwise specified** | Dec. 31, 2014                                                                                                                       | Dec. 31, 2013                                                                                                                       |
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| **Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis**                               |                                                                                                                                |                                                                                                                                |
| Fair value of life policy loans                                                                                  | $ 39us-gaap_LoansReceivableFairValueDisclosure                                                                                      | $ 45us-gaap_LoansReceivableFairValueDisclosure                                                                                      |
| Level 1                                                                                                          |                                                                                                                                |                                                                                                                                |
| **Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis**                               |                                                                                                                                |                                                                                                                                |
| Fair value of life policy loans                                                                                  | 0us-gaap_LoansReceivableFairValueDisclosure/ us-gaap_FairValueByFairValueHierarchyLevelAxis= us-gaap_FairValueInputsLevel1Member    | 0us-gaap_LoansReceivableFairValueDisclosure/ us-gaap_FairValueByFairValueHierarchyLevelAxis= us-gaap_FairValueInputsLevel1Member    |
| Level 2                                                                                                          |                                                                                                                                |                                                                                                                                |
| **Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis**                               |                                                                                                                                |                                                                                                                                |
| Fair value of life policy loans                                                                                  | 0us-gaap_LoansReceivableFairValueDisclosure/ us-gaap_FairValueByFairValueHierarchyLevelAxis= us-gaap_FairValueInputsLevel2Member    | 0us-gaap_LoansReceivableFairValueDisclosure/ us-gaap_FairValueByFairValueHierarchyLevelAxis= us-gaap_FairValueInputsLevel2Member    |
| Level 3                                                                                                          |                                                                                                                                |                                                                                                                                |
| **Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis**                               |                                                                                                                                |                                                                                                                                |
| Fair value of life policy loans                                                                                  | $ 39us-gaap_LoansReceivableFairValueDisclosure/ us-gaap_FairValueByFairValueHierarchyLevelAxis= us-gaap_FairValueInputsLevel3Member | $ 45us-gaap_LoansReceivableFairValueDisclosure/ us-gaap_FairValueByFairValueHierarchyLevelAxis= us-gaap_FairValueInputsLevel3Member |

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| - Definition
Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Glossary Loan -URI http://asc.fasb.org/extlink&oid=6517073
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