Fair Value (Tables)

3 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Information About Our Fixed Rate Financial Instruments Not Measured at Fair Value

Information about our fixed rate financial instruments not measured at fair value follows:

	December 31, 2018				September 30, 2018
	Carrying Amount		Fair Value		Carrying Amount		Fair Value		Valuation Technique
	(In millions)
Fixed rate debt	$	113.5	$	111.8	$	112.4	$	113.2	Level 2

Fair Value Measurements, Nonrecurring

Non-financial assets measured at fair value on a non-recurring basis are as follows:

	December 31, 2018								September 30, 2018
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
	(In millions)
Non-financial Assets and Liabilities:
Central Texas water assets	$	—	$	1.5	$	—	$	1.5	$	—	$	—	$	—	$	—
Real estate	$	—	$	—	$	—	$	—	$	—	$	0.2	$	—	$	0.2