Fair Value (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Assets:
Short-term investments	$ 119.9		$ 0.0
Carrying Amount
Assets:
Cash and cash equivalents	3,205.1		5,316.8
Short-term investments	119.9		0.0
Marketable equity securities	0.9		1.1
Non-marketable equity securities	5.6		6.5
Foreign currency derivatives	0.0		0.3
Liabilities:
Short-term debt	12.3		9.6
Foreign currency derivatives	0.4		0.1
Contingent purchase price obligations	154.5		167.1
Long-term debt	5,548.5		5,685.7
Fair Value
Assets:
Cash and cash equivalents	3,205.1		5,316.8
Short-term investments	119.9		0.0
Marketable equity securities	0.9		1.1
Non-marketable equity securities	5.6		6.5
Foreign currency derivatives	0.0		0.3
Liabilities:
Short-term debt	12.3		9.6
Foreign currency derivatives	0.4		0.1
Contingent purchase price obligations	154.5		167.1
Long-term debt	5,090.4		6,011.6
Contingent purchase price obligations
Changes in Contingent Purchase Price Obligations [Roll Forward]
January 1	167.1	$ 71.9
Acquisitions	0.8	92.2
Revaluation and interest	0.8	0.9
Payments	(9.9)	(5.4)
Foreign currency translation	(4.3)	(0.1)
June 30	154.5	$ 159.5
Fair Value, Recurring [Member]
Assets:
Cash and cash equivalents	3,205.1		5,316.8
Short-term investments	119.9
Marketable equity securities	0.9		1.1
Foreign currency derivatives			0.3
Liabilities:
Foreign currency derivatives	0.4		0.1
Contingent purchase price obligations	154.5		167.1
Fair Value, Recurring [Member] | Level 1
Assets:
Cash and cash equivalents	3,205.1		5,316.8
Marketable equity securities	0.9		1.1
Fair Value, Recurring [Member] | Level 2
Assets:
Short-term investments	119.9
Foreign currency derivatives			0.3
Liabilities:
Foreign currency derivatives	0.4		0.1
Fair Value, Recurring [Member] | Level 3
Liabilities:
Contingent purchase price obligations	$ 154.5		$ 167.1