Fair Value (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Assets:
Short-term investments	$ 94.9		$ 0.0
Carrying Amount
Assets:
Cash and cash equivalents	3,198.5		5,316.8
Short-term investments	94.9		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	10.2		9.6
Foreign currency derivatives	0.2		0.1
Contingent purchase price obligations	137.1		167.1
Long-term debt	5,450.6		5,685.7
Fair Value
Assets:
Cash and cash equivalents	3,198.5		5,316.8
Short-term investments	94.9		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	10.2		9.6
Foreign currency derivatives	0.2		0.1
Contingent purchase price obligations	137.1		167.1
Long-term debt	4,851.4		6,011.6
Contingent purchase price obligations
Changes in Contingent Purchase Price Obligations [Roll Forward]
January 1	167.1	$ 71.9
Acquisitions	10.7	92.3
Revaluation and interest	0.0	0.7
Payments	(32.7)	(16.8)
Foreign currency translation	(8.0)	(1.5)
September 30	137.1	$ 146.6
Fair Value, Recurring [Member]
Assets:
Cash and cash equivalents	3,198.5		5,316.8
Short-term investments	94.9
Marketable equity securities	0.9		1.1
Foreign currency derivatives			0.3
Liabilities:
Foreign currency derivatives	0.2		0.1
Contingent purchase price obligations	137.1		167.1
Fair Value, Recurring [Member] | Level 1
Assets:
Cash and cash equivalents	3,198.5		5,316.8
Marketable equity securities	0.9		1.1
Fair Value, Recurring [Member] | Level 2
Assets:
Short-term investments	94.9
Foreign currency derivatives			0.3
Liabilities:
Foreign currency derivatives	0.2		0.1
Fair Value, Recurring [Member] | Level 3
Liabilities:
Contingent purchase price obligations	$ 137.1		$ 167.1