Fair Value (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Assets:
Short-term investments	$ 87.4		$ 60.7
Carrying Amount
Assets:
Cash and cash equivalents	3,261.5		4,281.8
Short-term investments	87.4		60.7
Marketable equity securities	0.9		0.9
Non-marketable equity securities	6.1		5.6
Liabilities:
Short-term debt	18.5		16.9
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	14.3		16.5
Contingent purchase price obligations	128.0		115.0
Long-term debt	5,609.4		5,577.2
Fair Value
Assets:
Cash and cash equivalents	3,261.5		4,281.8
Short-term investments	87.4		60.7
Marketable equity securities	0.9		0.9
Non-marketable equity securities	6.1		5.6
Liabilities:
Short-term debt	18.5		16.9
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	14.3		16.5
Contingent purchase price obligations	128.0		115.0
Long-term debt	5,121.9		4,993.4
Contingent purchase price obligations
Changes in Level 3 Fair Value Measurements [Roll Forward]
January 1	115.0	$ 167.1
Acquisitions	21.6	0.5
Revaluation and interest	0.4	0.2
Payments	(9.2)	(6.0)
Foreign currency translation	0.2	(1.2)
March 31	128.0	$ 160.6
Fair Value, Recurring [Member]
Assets:
Cash and cash equivalents	3,261.5		4,281.8
Short-term investments	87.4		60.7
Marketable equity securities	0.9		0.9
Liabilities:
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	14.3		16.5
Contingent purchase price obligations	128.0		115.0
Fair Value, Recurring [Member] | Level 1
Assets:
Cash and cash equivalents	3,261.5		4,281.8
Marketable equity securities	0.9		0.9
Fair Value, Recurring [Member] | Level 2
Assets:
Short-term investments	87.4		60.7
Liabilities:
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	14.3		16.5
Fair Value, Recurring [Member] | Level 3
Liabilities:
Contingent purchase price obligations	$ 128.0		$ 115.0