Investments (Tables)

3 Months Ended

Dec. 31, 2018

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Investment

Our investments consist of (in millions):

	December 31, 2018			September 30, 2018
Fixed income securities	$	234.9		$	419.0
Equity securities	877.3			1,090.0
Other	69.0			69.9
Total investments	1,181.2			1,578.9
Less short-term investments	(121.2		)	(290.9		)
Long-term investments	$	1,060.0		$	1,288.0

Schedule of Available-for-sale Investments

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

	December 31, 2018		September 30, 2018
Certificates of deposit and time deposits	$	3.7	$	169.6
Corporate debt securities	151.1		158.4
Government securities	59.0		65.8
Asset-backed securities	21.1		25.2
Total	$	234.9	$	419.0

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

	December 31, 2018		September 30, 2018
Short-term investments	$	121.2	$	290.9
Long-term investments	113.7		128.1
Total	$	234.9	$	419.0

Investments Classified by Contractual Maturity Date

The table below summarizes the contractual maturities of our investments as of December 31, 2018 (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	$	121.2
Due in one to five years	113.7
Total	$	234.9

Fair Value Measurements, Recurring and Nonrecurring

Fair values of our investments were (in millions):

	December 31, 2018
	Level 1		Level 2		Level 3		Total
Certificates of deposit and time deposits	$	—	$	3.7	$	—	$	3.7
Corporate debt securities	—		151.1		—		151.1
Government securities	48.9		10.1		—		59.0
Asset-backed securities	—		21.1		—		21.1
Equity securities	877.3		—		—		877.3
Total	$	926.2	$	186.0	$	—	$	1,112.2

	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 December 31, 2018	$	—