Subsequent Events - USD ($) $ in Millions			12 Months Ended
	Feb. 18, 2022	Feb. 09, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Revenues			$ 16,120.9	$ 13,978.5	$ 11,554.8
Ascension Acquisition | Subsequent Event
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross		$ 400.0
PGDx Acquisition | Subsequent Event
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross	$ 450.0
Payments to acquire business, future performance milestone	$ 125.0