Retirement Plans (Fair Value Of Pension Plan Assets By Investment Category And The Corresponding Level Within The Fair Value Hierarchy) (Details) (USD $) | 12 Months Ended |
In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | $8,476 | | $7,227 | |
Maximum equity holding percentage of total fair value | 1.00% | | 1.00% | |
Equity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 3,935 | | 3,791 | |
Money Market Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 97 | | 240 | |
Fixed Income Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 303 | | 165 | |
Real Estate Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 34 | | 32 | |
Commodity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 8 | | 8 | |
Hedge Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 471 | | 301 | |
Insurance Deposit Agreements | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 115 | | 108 | |
U.S. Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 685 | [1] | 500 | [1] |
International Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | ' | | 85 | |
Private Equity Investments | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | ' | | 8 | |
Equity Securities, Investment Summary [Member] | International Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 128 | | ' | |
Equity Securities, Investment Summary [Member] | Private Equity Investments | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 10 | | ' | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 1,562 | | 1,072 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 286 | | 303 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Real Estate Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Hedge Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Insurance Deposit Agreements | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 685 | [1] | 500 | [1] |
Quoted Prices in Active Markets for Identical Assets (Level 1) | International Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 128 | | 85 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Private Equity Investments | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Other Observable Inputs (Level 2) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 6,572 | | 5,907 | |
Significant Other Observable Inputs (Level 2) | Equity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 3,649 | | 3,488 | |
Significant Other Observable Inputs (Level 2) | Money Market Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 97 | | 240 | |
Significant Other Observable Inputs (Level 2) | Fixed Income Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 303 | | 165 | |
Significant Other Observable Inputs (Level 2) | Real Estate Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Other Observable Inputs (Level 2) | Commodity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 8 | | 8 | |
Significant Other Observable Inputs (Level 2) | Hedge Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 288 | | 201 | |
Significant Other Observable Inputs (Level 2) | Insurance Deposit Agreements | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Other Observable Inputs (Level 2) | U.S. Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | [1] | 0 | [1] |
Significant Other Observable Inputs (Level 2) | International Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Other Observable Inputs (Level 2) | Private Equity Investments | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 342 | | 248 | |
Significant Unobservable Inputs (Level 3) | Equity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) | Money Market Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) | Fixed Income Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) | Real Estate Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 34 | | 32 | |
Significant Unobservable Inputs (Level 3) | Commodity Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) | Hedge Funds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 183 | | 100 | |
Significant Unobservable Inputs (Level 3) | Insurance Deposit Agreements | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 115 | | 108 | |
Significant Unobservable Inputs (Level 3) | U.S. Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | [1] | 0 | [1] |
Significant Unobservable Inputs (Level 3) | International Companies | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) | Private Equity Investments | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 10 | | 8 | |
Cash | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 35 | | 43 | |
Cash | Quoted Prices in Active Markets for Identical Assets (Level 1) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 35 | | 43 | |
Cash | Significant Other Observable Inputs (Level 2) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Cash | Significant Unobservable Inputs (Level 3) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Treasury Securities | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 428 | | 141 | |
Treasury Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 428 | | 141 | |
Treasury Securities | Significant Other Observable Inputs (Level 2) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Treasury Securities | Significant Unobservable Inputs (Level 3) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | | 0 | |
Corporate Bonds | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 2,227 | [2] | 1,805 | [3] |
Corporate Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 0 | [2] | 0 | [3] |
Corporate Bonds | Significant Other Observable Inputs (Level 2) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | 2,227 | [2] | 1,805 | [3] |
Corporate Bonds | Significant Unobservable Inputs (Level 3) | ' | | ' | |
Compensation And Retirement Disclosure Line Items | ' | | ' | |
Total pension plan assets | $0 | [2] | $0 | [3] |
|
[1] | No single equity holding amounted to more than 1 percent of the total fair value. |
[2] | Our corporate bond investments had an average rating of A-. |
[3] | Our corporate bond investments had an average rating of BBB+. |