Investments (Tables)

6 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Investment

Our investments consist of (in millions):

	March 31, 2019			September 30, 2018
Fixed income securities	$	190.0		$	419.0
Equity securities	975.5			1,090.0
Other	68.6			69.9
Total investments	1,234.1			1,578.9
Less short-term investments	(122.2		)	(290.9		)
Long-term investments	$	1,111.9		$	1,288.0

Schedule of Available-for-sale Investments

Our available-for-sale investments consist of (in millions):

	March 31, 2019		September 30, 2018
Certificates of deposit and time deposits	$	0.6	$	169.6
Corporate debt securities	132.5		158.4
Government securities	39.9		65.8
Asset-backed securities	17.0		25.2
Total	$	190.0	$	419.0

These investments were included in the following line items within the Consolidated Balance Sheet (in millions):

	March 31, 2019		September 30, 2018
Short-term investments	$	122.2	$	290.9
Long-term investments	67.8		128.1
Total	$	190.0	$	419.0

Investments Classified by Contractual Maturity Date

The table below summarizes the contractual maturities of our investments as of March 31, 2019 (in millions). Actual maturities may differ from the contractual maturities below as borrowers may have the right to prepay certain obligations.

	Fair Value
Less than one year	$	122.2
Due in one to five years	67.8
Total	$	190.0

Fair Value Measurements, Recurring and Nonrecurring

Fair values of our investments were (in millions):

	March 31, 2019
	Level 1		Level 2		Level 3		Total
Certificates of deposit and time deposits	$	—	$	0.6	$	—	$	0.6
Corporate debt securities	—		132.5		—		132.5
Government securities	36.6		3.3		—		39.9
Asset-backed securities	—		17.0		—		17.0
Equity securities	975.5		—		—		975.5
Total	$	1,012.1	$	153.4	$	—	$	1,165.5

	September 30, 2018
	Level 1		Level 2		Level 3		Total
Certificates of deposit and time deposits	$	—	$	169.6	$	—	$	169.6
Corporate debt securities	—		158.4		—		158.4
Government securities	55.7		10.1		—		65.8
Asset-backed securities	—		25.2		—		25.2
Equity securities	—		—		1,090.0		1,090.0
Total	$	55.7	$	363.3	$	1,090.0	$	1,509.0

Summary of Changes in the Fair Value of Level 3 Investments

The table below sets forth a summary of changes in the fair value of our Level 3 investments (in millions):

	Fair Value
Balance September 30, 2018	$	1,090.0
Unrealized loss	(149.0		)
Transfer to Level 1 upon registration of PTC Shares on November 28, 2018	(941.0		)
Balance March 31, 2019	$	—