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Goodwill And Intangible Assets (Schedule Of Estimated Amortization) (Details) (USD $)
In Millions, unless otherwise specified
Apr. 04, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated annual amortization, 2016 $ 63.5us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Estimated annual amortization, 2019 56.7us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Estimated annual amortization, 2018 54.9us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Estimated annual amortization, 2019 54.4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Estimated annual amortization, 2020 $ 51.7rbc_FiniteLivedIntangibleAssetsAmortizationExpenseYearSix