Acquisitions and Divestitures - Divestitures (Details) € in Millions, $ in Millions										3 Months Ended	12 Months Ended
	Dec. 20, 2017 product	Nov. 21, 2017 USD ($)	Aug. 25, 2017 EUR (€)	Aug. 25, 2017 USD ($)	Apr. 06, 2017 USD ($)	Feb. 01, 2017 USD ($)	Jan. 03, 2017 USD ($)	Aug. 05, 2016 USD ($)	May 01, 2015 product	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets											$ 5.2	$ 154.6	$ 69.1
Impairment charge										$ 3.3
Payment of guaranty liability											3.3
Net sales threshold for 1.5 million milestone payment											25.0
Net sales threshold for 5 million milestone payment											$ 50.0
Unrecorded gain contingency, royalty payment percentage											2.50%
First
Business Acquisition [Line Items]
Gain contingency, unrecorded amount											$ 1.5
Second
Business Acquisition [Line Items]
Gain contingency, unrecorded amount											5.0
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
Other
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets					$ 22.2
Impairment charge													35.3
CHCI
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets			€ 12.7	$ 15.1
Impairment charge												$ 3.7
CHCA
Business Acquisition [Line Items]
Impairment charge													$ 6.2
Development-Stage Rx Products
Business Acquisition [Line Items]
Business combination, number of products purchased | product									2
Number of products sold | product	1
Held for sale | Israel API
Business Acquisition [Line Items]
Net proceeds from sale of business and other assets		$ 110.0
Recurring | Level 3
Business Acquisition [Line Items]
Guarantee on certain obligations		$ 13.8									$ 10.5