Fair Value Measurement (Tables)

6 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of fair values of financial assets and liabilities

The fair values of the Company’s financial assets and liabilities were as follows (in millions):

	Level 1		Level 2		Level 3		Total
March 31, 2018
Assets:
SERP plan assets (a)	$	21.6	$	—	$	—	$	21.6
Foreign currency exchange derivatives (b)	—		0.6		—		0.6
Liabilities:
Foreign currency exchange derivatives (b)	$	—	$	0.8	$	—	$	0.8

	Level 1		Level 2		Level 3		Total
September 30, 2017
Assets:
SERP plan assets (a)	$	21.7	$	—	$	—	$	21.7
Foreign currency exchange derivatives (b)	—		0.5		—		0.5
Interest rate contracts (c)	—		0.3		—		0.3
Liabilities:
Foreign currency exchange derivatives (b)	$	—	$	1.2	$	—	$	1.2
Interest rate contracts (c)	—		0.7		—		0.7

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^(a)  Represents investments in a rabbi trust for the Company's non-qualified supplemental executive retirement plan (SERP). The fair values of these investments are determined using a market approach. Investments include mutual funds for which quoted prices in active markets are available. The Company records changes in the fair value of investments in “Miscellaneous, net” in the Condensed Consolidated Statements of Income.

^(b)  Based on observable market transactions of forward currency prices.

^(c)  Based on observable market transactions of interest rate swap prices.