Divestitures (Details) € in Millions, $ in Millions							3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 25, 2017 USD ($)	Aug. 25, 2017 EUR (€)	Apr. 06, 2017 USD ($)	Feb. 01, 2017 USD ($)	Jan. 03, 2017 USD ($)	Aug. 05, 2016 USD ($)	Sep. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)	Sep. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets									$ 46.7	$ 58.5
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		$ 61.8
Impairment charge											$ 6.2
Other
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets			$ 22.2
Impairment charge							$ 3.3				$ 35.3
CHCI
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets	$ 15.1
Impairment charge								$ 3.7
Euro Member Countries, Euro | CHCI
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets | €		€ 12.7