Divestitures (Details) - USD ($) $ in Millions			3 Months Ended
	Feb. 01, 2017	Jan. 03, 2017	Mar. 31, 2018	Apr. 01, 2017
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets			$ 1.3	$ 25.3
RX
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets		$ 15.0
CHCA
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets	$ 7.7