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Benefit Plans (Allocation Of Plan Assets) (Details)
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12 Months Ended |
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Dec. 31, 2012
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Pension Plans, Defined Benefit [Member] | Cash and Equivalents [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
0.00% |
| Target range allocation, maximum |
5.00% |
| Actual allocation |
4.00% |
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Pension Plans, Defined Benefit [Member] | U.S. Large Cap Core [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
10.00% |
| Target range allocation, maximum |
20.00% |
| Actual allocation |
13.00% |
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Pension Plans, Defined Benefit [Member] | U.S. Large Cap Value [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
6.00% |
| Target range allocation, maximum |
16.00% |
| Actual allocation |
11.00% |
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Pension Plans, Defined Benefit [Member] | U.S. Large Cap Growth [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
6.00% |
| Target range allocation, maximum |
16.00% |
| Actual allocation |
11.00% |
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Pension Plans, Defined Benefit [Member] | U.S. Small Cap Value [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
0.00% |
| Target range allocation, maximum |
6.00% |
| Actual allocation |
3.00% |
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Pension Plans, Defined Benefit [Member] | U.S. Small Cap Growth [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
0.00% |
| Target range allocation, maximum |
6.00% |
| Actual allocation |
3.00% |
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Pension Plans, Defined Benefit [Member] | International - Developed Markets [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
11.00% |
| Target range allocation, maximum |
23.00% |
| Actual allocation |
16.00% |
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Pension Plans, Defined Benefit [Member] | International - Emerging Markets [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
0.00% |
| Target range allocation, maximum |
8.00% |
| Actual allocation |
4.00% |
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Pension Plans, Defined Benefit [Member] | Global Asset Allocation Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
5.00% |
| Target range allocation, maximum |
15.00% |
| Actual allocation |
10.00% |
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Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
15.00% |
| Target range allocation, maximum |
35.00% |
| Actual allocation |
25.00% |
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Other Postretirement Benefits Plans [Member] | Cash and Equivalents [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
0.00% |
| Target range allocation, maximum |
5.00% |
| Actual allocation |
2.00% |
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Other Postretirement Benefits Plans [Member] | Domestic [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
25.00% |
| Target range allocation, maximum |
45.00% |
| Actual allocation |
34.00% |
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Other Postretirement Benefits Plans [Member] | International [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
10.00% |
| Target range allocation, maximum |
20.00% |
| Actual allocation |
15.00% |
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Other Postretirement Benefits Plans [Member] | Global Asset Allocation Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
20.00% |
| Target range allocation, maximum |
40.00% |
| Actual allocation |
29.00% |
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Other Postretirement Benefits Plans [Member] | Fixed Income Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] |
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| Target range allocation, minimum |
10.00% |
| Target range allocation, maximum |
30.00% |
| Actual allocation |
20.00% |