Pension and Other Postretirement Benefits (Details 6) (USD $) | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 |
In Millions, unless otherwise specified |
Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | $2,487 | $2,288 | $2,054 |
Other Postretirement Benefits | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 370 | 328 | 297 |
Pension Plan Assets, Total | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 2,487 | 2,288 | ' |
Pension Plan Assets, Total | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 563 | 554 | ' |
Pension Plan Assets, Total | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 1,776 | 1,575 | ' |
Pension Plan Assets, Total | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 148 | 159 | ' |
Cash and equivalents | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 27 | 26 | ' |
Cash and equivalents | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 27 | 26 | ' |
Cash and equivalents | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Cash and equivalents | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Cash and equivalents | Other Postretirement Benefits | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 9 | 34 | ' |
Cash and equivalents | Other Postretirement Benefits | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 9 | 34 | ' |
Cash and equivalents | Other Postretirement Benefits | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Cash and equivalents | Other Postretirement Benefits | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Domestic | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 56 | ' |
Domestic | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 56 | ' |
Domestic | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Domestic | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Foreign | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 77 | 85 | ' |
Foreign | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 77 | 85 | ' |
Foreign | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Foreign | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Government securities | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 314 | 245 | ' |
Government securities | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Government securities | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 314 | 245 | ' |
Government securities | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Corporate debt securities | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 316 | 263 | ' |
Corporate debt securities | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Corporate debt securities | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 316 | 263 | ' |
Corporate debt securities | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Mortgage-backed securities | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 10 | 12 | ' |
Mortgage-backed securities | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Mortgage-backed securities | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 10 | 12 | ' |
Mortgage-backed securities | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Investment contracts with insurance companies | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 67 | 75 | ' |
Investment contracts with insurance companies | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Investment contracts with insurance companies | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Investment contracts with insurance companies | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 67 | 75 | ' |
Mutual funds | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 459 | 387 | ' |
Mutual funds | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 459 | 387 | ' |
Mutual funds | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Mutual funds | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Collective trust funds | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 1,135 | 1,055 | ' |
Collective trust funds | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Collective trust funds | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 1,135 | 1,055 | ' |
Collective trust funds | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Partnerships/private equity interests | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 81 | 84 | ' |
Partnerships/private equity interests | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Partnerships/private equity interests | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Partnerships/private equity interests | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 81 | 84 | ' |
Other | Pension | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 1 | ' | ' |
Other | Pension | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | ' | ' |
Other | Pension | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 1 | ' | ' |
Other | Pension | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | ' | ' |
Other Postretirement Benefit Plan Assets, Total | Other Postretirement Benefits | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 370 | 328 | ' |
Other Postretirement Benefit Plan Assets, Total | Other Postretirement Benefits | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 9 | 34 | ' |
Other Postretirement Benefit Plan Assets, Total | Other Postretirement Benefits | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Other Postretirement Benefit Plan Assets, Total | Other Postretirement Benefits | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 361 | 294 | ' |
Life insurance policies | Other Postretirement Benefits | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 361 | 294 | ' |
Life insurance policies | Other Postretirement Benefits | Level 1 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Life insurance policies | Other Postretirement Benefits | Level 2 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | 0 | 0 | ' |
Life insurance policies | Other Postretirement Benefits | Level 3 | ' | ' | ' |
Defined benefit plan assets for plan benefits | ' | ' | ' |
Fair value of plan assets | $361 | $294 | ' |