Fair Value Measurements (U.S. Plans) (Details) (USD $) | Dec. 31, 2013 | Dec. 31, 2012 |
In Millions, unless otherwise specified |
Common stock and equivalents | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Securities Held as Collateral, at Fair Value | $125 | $117 |
Government, agency, and government-sponsored enterprise obligations | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Securities Held as Collateral, at Fair Value | 199 | 260 |
Corporate bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Securities Held as Collateral, at Fair Value | 19 | 17 |
Level 1 | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 38 | 44 |
Level 1 | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 1,430 | 1,601 |
Level 1 | Common stock and equivalents | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 38 | 44 |
Level 1 | Common stock and equivalents | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 1,424 | 1,592 |
Level 1 | Commingled equity funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 0 | 0 |
Level 1 | Commingled equity funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 1 | Preferred stock | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 6 | 9 |
Level 1 | Government, agency, and government-sponsored enterprise obligations | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 0 | 0 |
Level 1 | Government, agency, and government-sponsored enterprise obligations | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 1 | Other government bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 1 | Corporate bonds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 0 | 0 |
Level 1 | Corporate bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 1 | Mortgage-backed bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 1 | Commingled bond funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 0 | 0 |
Level 1 | Commingled bond funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 1 | Commingled short-term investment funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 0 | 0 |
Level 1 | Commingled short-term investment funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 1 | Invested Cash | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | ' | 0 |
Level 2 | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 123 | 111 |
Level 2 | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 4,634 | 3,815 |
Level 2 | Common stock and equivalents | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 0 | 0 |
Level 2 | Common stock and equivalents | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 3 |
Level 2 | Commingled equity funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 55 | 56 |
Level 2 | Commingled equity funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 2,045 | 1,965 |
Level 2 | Preferred stock | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 0 | 0 |
Level 2 | Government, agency, and government-sponsored enterprise obligations | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 6 | 9 |
Level 2 | Government, agency, and government-sponsored enterprise obligations | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 238 | 317 |
Level 2 | Other government bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 42 | 49 |
Level 2 | Corporate bonds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 1 | 9 |
Level 2 | Corporate bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 336 | 327 |
Level 2 | Mortgage-backed bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 15 | 14 |
Level 2 | Commingled bond funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 49 | 30 |
Level 2 | Commingled bond funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 1,862 | 1,082 |
Level 2 | Commingled short-term investment funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 3 | 6 |
Level 2 | Commingled short-term investment funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 96 | 58 |
Level 2 | Invested Cash | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | ' | 0 |
Total | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 161 | 155 |
Total | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 6,064 | 5,416 |
Accrued income receivable | 7 | 10 |
Fair value plan assets | 6,071 | 5,426 |
Total | Common stock and equivalents | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 38 | 44 |
Total | Common stock and equivalents | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 1,424 | 1,595 |
Total | Commingled equity funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 55 | 56 |
Total | Commingled equity funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 2,045 | 1,965 |
Total | Preferred stock | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 6 | 9 |
Total | Government, agency, and government-sponsored enterprise obligations | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 6 | 9 |
Total | Government, agency, and government-sponsored enterprise obligations | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 238 | 317 |
Total | Other government bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 42 | 49 |
Total | Corporate bonds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 1 | 9 |
Total | Corporate bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 336 | 327 |
Total | Mortgage-backed bonds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 15 | 14 |
Total | Commingled bond funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 49 | 30 |
Total | Commingled bond funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 1,862 | 1,082 |
Total | Commingled short-term investment funds | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Fair value plan assets | 3 | 6 |
Total | Commingled short-term investment funds | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | 96 | 58 |
Total | Invested Cash | U.S. Pension Benefit Plans | ' | ' |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] | ' | ' |
Total investment securities | ' | $0 |