|
Retirement Plans (Schedule Of Fair Values Of Pension Assets By Asset Class) (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Total investments, sum of allocation percentages | 100.00% | 100.00% |
| Fair value measurements | $ 1,187 | $ 632 |
|
Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 344 | 376 |
|
Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 753 | 198 |
|
Level 3 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 90 | 58 |
|
Equity Securities [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Equity securities, actual allocation | 18.00% | 50.80% |
| Fair value measurements | 214 | 321 |
|
Equity Securities [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 139 | |
|
Equity Securities [Member] | Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 214 | 182 |
|
Equity Securities [Member] | United States Large Cap [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Equity securities, actual allocation | 22.30% | |
| Fair value measurements | 141 | |
|
Equity Securities [Member] | United States Large Cap [Member] | Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 141 | |
|
Equity Securities [Member] | United States Small Cap [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Equity securities, actual allocation | 14.10% | |
| Fair value measurements | 89 | |
|
Equity Securities [Member] | United States Small Cap [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 89 | |
|
Equity Securities [Member] | International Large Cap [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Equity securities, actual allocation | 14.40% | |
| Fair value measurements | 91 | |
|
Equity Securities [Member] | International Large Cap [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 50 | |
|
Equity Securities [Member] | International Large Cap [Member] | Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 41 | |
|
Fixed Income Securities [Member]
|
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Fixed income securities, actual allocation | 71.80% | 37.50% |
| Fair value measurements | 852 | 237 |
|
Fixed Income Securities [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 328 | 237 |
|
Fixed Income Securities [Member] | Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 524 | |
|
Fixed Income Securities [Member] | Corporate Bonds [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fixed income securities, actual allocation | 24.80% | 22.00% |
| Fair value measurements | 294 | 139 |
|
Fixed Income Securities [Member] | Corporate Bonds [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 265 | 139 |
|
Fixed Income Securities [Member] | Corporate Bonds [Member] | Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 29 | |
|
Fixed Income Securities [Member] | United States Treasury Obligations [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fixed income securities, actual allocation | 43.90% | 10.90% |
| Fair value measurements | 522 | 69 |
|
Fixed Income Securities [Member] | United States Treasury Obligations [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 27 | 69 |
|
Fixed Income Securities [Member] | United States Treasury Obligations [Member] | Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 495 | |
|
Fixed Income Securities [Member] | Other Bonds [Member]
|
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Fixed income securities, actual allocation | 3.10% | 4.60% |
| Fair value measurements | 36 | 29 |
|
Fixed Income Securities [Member] | Other Bonds [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 36 | 29 |
|
Other Securities [Member]
|
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Other securities, actual allocation | 10.20% | 11.70% |
| Fair value measurements | 121 | 74 |
|
Other Securities [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 16 | |
|
Other Securities [Member] | Level 2 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 15 | 16 |
|
Other Securities [Member] | Level 3 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 90 | 58 |
|
Other Securities [Member] | Hedge Fund & Alternative Investments [Member]
|
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Other securities, actual allocation | 8.90% | 9.20% |
| Fair value measurements | 106 | 58 |
|
Other Securities [Member] | Hedge Fund & Alternative Investments [Member] | Level 1 Inputs [Member]
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 16 | |
|
Other Securities [Member] | Hedge Fund & Alternative Investments [Member] | Level 3 Inputs [Member]
|
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | 90 | 58 |
|
Other Securities [Member] | Short Term Investment Funds [Member]
|
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Other securities, actual allocation | 1.30% | 2.50% |
| Fair value measurements | 15 | 16 |
|
Other Securities [Member] | Short Term Investment Funds [Member] | Level 2 Inputs [Member]
|
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair value measurements | $ 15 | $ 16 |