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Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Statement of Comprehensive Income [Abstract]      
Depreciation and other excluded from direct operating expenses $ 125.7us-gaap_CostOfGoodsSoldDepreciation $ 129.1us-gaap_CostOfGoodsSoldDepreciation $ 127.0us-gaap_CostOfGoodsSoldDepreciation