Debt and Financing Arrangements (Interest Rate Derivatives) (Details) $ in Millions	Dec. 31, 2017 USD ($)
June 30, 2017
Derivative [Line Items]
Notional Amount (in millions)	$ 250.0
Fixed Rate	1.372%
June 29, 2018
Derivative [Line Items]
Notional Amount (in millions)	$ 250.0
Fixed Rate	1.662%
June 28, 2019
Derivative [Line Items]
Notional Amount (in millions)	$ 200.0
Fixed Rate	1.952%
June 30, 2020
Derivative [Line Items]
Notional Amount (in millions)	$ 150.0
Fixed Rate	2.182%