Commitments and Contingencies (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Business Acquisition, Contingent Consideration
Contingent consideration	$ 66.6	$ 54.4
Purchase obligation	54.4
Accrued Liabilities
Business Acquisition, Contingent Consideration
Contingent consideration	30.3	22.2
Other Noncurrent Liabilities
Business Acquisition, Contingent Consideration
Contingent consideration	$ 36.3	$ 32.3
Bio-Reference
Business Acquisition, Contingent Consideration
Period in preferred provider organization	20 years
Bio-Reference
Business Acquisition, Contingent Consideration
Severance costs	$ 17.2