Employee Benefit Plans (Summary of Participants) (Details)
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Dec. 31, 2010
employees
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Pension Plans, Defined Benefit [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||
Active Employees | 4,879 | |||
Retirees And Beneficiaries | 11,360 | |||
Other | 6,340 | [1] | ||
Total | 22,579 | |||
Other Postretirement Benefit Plans, Defined Benefit [Member]
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Defined Benefit Plan Disclosure [Line Items] | ||||
Active Employees | 2,827 | |||
Retirees And Beneficiaries | 12,234 | |||
Other | 62 | [1] | ||
Total | 15,123 | |||
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