Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Carrying Amounts and Estimated Fair Values of Other Financial Instruments

The following table presents the carrying amounts and estimated fair values of the Company’s other financial instruments at March 31, 2018 and December 31, 2017:

		March 31, 2018						December 31, 2017
	Input	Carrying			Fair			Carrying			Fair
	Level	Amount			Value			Amount			Value
Financial Assets:
Cash equivalents	Level 1	$	43.9		$	43.9		$	95.8		$	95.8
Financial Liabilities:
Short-term borrowings	Level 2		253.5			253.5			270.9			270.9
Floating Rate Senior notes due January 25, 2019	Level 2		300.0			299.9			300.0			299.9
2.45% Senior notes due December 15, 2019	Level 2		299.9			298.5			299.9			300.9
2.45% Senior notes due August 1, 2022	Level 2		299.7			290.3			299.7			296.1
2.875% Senior notes due October 1, 2022	Level 2		399.8			394.9			399.8			400.2
3.15% Senior notes due August 1, 2027	Level 2		424.6			400.9			424.6			417.8
3.95% Senior notes due August 1, 2047	Level 2		397.1			373.8			397.1			397.4
Contingent consideration	Level 3		30.5			30.5			23.2			23.2
Fair value adjustment asset (liability) related to hedged fixed rate    debt instrument	Level 2		(4.1	)		(4.1	)		(2.2	)		(2.2	)