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Fair Value (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Assets:
Short-term investments	$ 75.9		$ 60.7
Carrying Amount
Assets:
Cash and cash equivalents	2,734.1		4,281.8
Short-term investments	75.9		60.7
Marketable equity securities	0.8		0.9
Non-marketable equity securities	6.8		5.6
Liabilities:
Short-term debt	20.5		16.9
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	6.4		16.5
Contingent purchase price obligations	158.0		115.0
Long-term debt	5,613.7		5,577.2
Fair Value
Assets:
Cash and cash equivalents	2,734.1		4,281.8
Short-term investments	75.9		60.7
Marketable equity securities	0.8		0.9
Non-marketable equity securities	6.8		5.6
Liabilities:
Short-term debt	20.5		16.9
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	6.4		16.5
Contingent purchase price obligations	158.0		115.0
Long-term debt	5,029.2		4,993.4
Contingent purchase price obligations
Changes in Level 3 Fair Value Measurements [Roll Forward]
January 1	115.0	$ 167.1
Acquisitions	62.9	0.8
Revaluation and interest	(6.2)	0.8
Payments	(14.3)	(9.9)
Foreign currency translation	0.6	(4.3)
June 30	158.0	$ 154.5
Fair Value, Recurring [Member]
Assets:
Cash and cash equivalents	2,734.1		4,281.8
Short-term investments	75.9		60.7
Marketable equity securities	0.8		0.9
Liabilities:
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	6.4		16.5
Contingent purchase price obligations	158.0		115.0
Fair Value, Recurring [Member] | Level 1
Assets:
Cash and cash equivalents	2,734.1		4,281.8
Marketable equity securities	0.8		0.9
Fair Value, Recurring [Member] | Level 2
Assets:
Short-term investments	75.9		60.7
Liabilities:
Foreign currency derivatives	0.0		0.1
Cross currency swaps - net investment hedge	6.4		16.5
Fair Value, Recurring [Member] | Level 3
Liabilities:
Contingent purchase price obligations	$ 158.0		$ 115.0

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