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Other Post-Retirement Employee Benefit Plans (Effect Of One-Percentage-Point Change In Assumed Health Care Cost Trend Rates) (Details) (Other Post-Retirement Benefits, USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Other Post-Retirement Benefits
 
Defined Benefit Plan Disclosure [Line Items]  
Effect on the total of service and interest cost components, 1% Increase $ 1.1
Effect on the total of service and interest cost components, 1% Decrease (0.7)
Effect on post-retirement medical benefit obligation, 1% Increase 8.4
Effect on post-retirement medical benefit obligation, 1% Decrease $ (6.9)