Retirement Benefits (Weighted Average Actuarial Assumptions Used To Determine Health Care Benefit Obligations for the Plans) (Details) (Postretirement Health Care Benefits Plan)
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Dec. 31, 2014
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Dec. 31, 2013
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Postretirement Health Care Benefits Plan
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Defined Benefit Plan Disclosure [Line Items] | ||
Discount rate for obligations | 3.90% | 4.65% |