XML 34 R81.htm IDEA: XBRL DOCUMENT v2.4.1.9
Employee Benefit Plans (Schedule Of Contributions To The Retirement Savings Plan) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]      
Retirement savings match $ 9.7pol_EmployerContributionRetirementSavingsMatch $ 9.8pol_EmployerContributionRetirementSavingsMatch $ 7.6pol_EmployerContributionRetirementSavingsMatch
Retirement benefit contribution 4.0pol_EmployerContributionRetirementBenefitContribution 4.0pol_EmployerContributionRetirementBenefitContribution 3.8pol_EmployerContributionRetirementBenefitContribution
Total contributions $ 13.7pol_EmployerContributionToRetirementSavingsPlan $ 13.8pol_EmployerContributionToRetirementSavingsPlan $ 11.4pol_EmployerContributionToRetirementSavingsPlan