Fair Value Measurements (Details) (USD $) | Dec. 31, 2013 | Dec. 31, 2012 |
Fair Value Measurements Textuals | ' | ' |
Par Value of Structured Notes | ' | $38,000,000 |
Fair Value of Structured Notes | 38,000,000 | 41,000,000 |
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | 209,000,000 | 247,000,000 |
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | 3,043,000,000 | 3,255,000,000 |
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | 38,000,000 | 41,000,000 |
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | 3,290,000,000 | 3,543,000,000 |
US Government and Agencies | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
US Government and Agencies | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 126,000,000 | 139,000,000 |
US Government and Agencies | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
US Government and Agencies | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 126,000,000 | 139,000,000 |
State and Political Subdivisions | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
State and Political Subdivisions | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 1,075,000,000 | 1,300,000,000 |
State and Political Subdivisions | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
State and Political Subdivisions | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 1,075,000,000 | 1,300,000,000 |
Corporate Debt Securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Corporate Debt Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 1,606,000,000 | 1,499,000,000 |
Corporate Debt Securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Corporate Debt Securities | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 1,606,000,000 | 1,499,000,000 |
Foreign Government Bonds | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Foreign Government Bonds | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 43,000,000 | 48,000,000 |
Foreign Government Bonds | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Foreign Government Bonds | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 43,000,000 | 48,000,000 |
Mortgage-backed/asset-backed securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Mortgage-backed/asset-backed securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 109,000,000 | 154,000,000 |
Mortgage-backed/asset-backed securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Mortgage-backed/asset-backed securities | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 109,000,000 | 154,000,000 |
Preferred Stock, Available for Sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 73,000,000 | 109,000,000 |
Preferred Stock, Available for Sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 78,000,000 | 108,000,000 |
Preferred Stock, Available for Sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Preferred Stock, Available for Sale | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 151,000,000 | 217,000,000 |
Equity Securities, Available for Sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 136,000,000 | 138,000,000 |
Equity Securities, Available for Sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Equity Securities, Available for Sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | 0 |
Equity Securities, Available for Sale | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 136,000,000 | 138,000,000 |
Other Long-term Investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 0 | 0 |
Other Long-term Investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 0 | 0 |
Other Long-term Investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 38,000,000 | 41,000,000 |
Other Long-term Investments | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 38,000,000 | 41,000,000 |
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 0 | ' |
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 4,000,000 | 6,000,000 |
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 0 | ' |
Foreign Exchange Contract [Member] | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Long Term Investments Fair Value | 4,000,000 | 6,000,000 |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Liabilities, Fair Value Disclosure | 1,000,000 | ' |
Other Assets, Fair Value Disclosure | 2,000,000 | 2,000,000 |
Interest Rate Swap [Member] | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Other Liabilities, Fair Value Disclosure | 1,000,000 | ' |
Other Assets, Fair Value Disclosure | 2,000,000 | 2,000,000 |
Commodity Contract [Member] | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | ' |
Commodity Contract [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 2,000,000 | 2,000,000 |
Other Long Term Investments Fair Value | ' | 1,000,000 |
Commodity Contract [Member] | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 0 | ' |
Commodity Contract [Member] | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Available-for-sale Securities, Fair Value | 2,000,000 | 2,000,000 |
Other Long Term Investments Fair Value | ' | 1,000,000 |
Liabilities, Total [Member] | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | 0 | ' |
Liabilities, Total [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | 3,000,000 | 4,000,000 |
Liabilities, Total [Member] | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | 0 | ' |
Liabilities, Total [Member] | Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring | ' | ' |
Fair Value, Balance Sheet Grouping, Financial Statement Captions | ' | ' |
Total | $3,000,000 | $4,000,000 |