Investments (Tables)

12 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

Our investments consist of (in millions):

	September 30,
	2020			2019
Fixed income securities	$	0.6		$	43.9
Equity securities	875.3			721.5
Other	78.2			68.1
Total investments	954.1			833.5
Less short-term investments	(0.6		)	(39.6		)
Long-term investments	$	953.5		$	793.9

Schedule of Available-for-sale Investments

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

	September 30,
	2020		2019
Certificates of deposit and time deposits	$	0.6	$	0.6
Corporate debt securities	—		31.8
Government securities	—		6.3
Asset-backed securities	—		5.2
Total	$	0.6	$	43.9

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

	September 30,
	2020		2019
Other current assets	$	0.6	$	39.6
Long-term investments	—		4.3
Total	$	0.6	$	43.9

Schedule of Fair Value of Investments

Fair values of our investments were (in millions):

	September 30, 2020
	Level 1		Level 2		Level 3		Total
Certificates of deposit and time deposits	$	—	$	0.6	$	—	$	0.6
Equity securities	875.3		—		—		875.3
Total	$	875.3	$	0.6	$	—	$	875.9

	September 30, 2019
	Level 1		Level 2		Level 3		Total
Certificates of deposit and time deposits	$	—	$	0.6	$	—	$	0.6
Corporate debt securities	—		31.8		—		31.8
Government securities	6.3		—		—		6.3
Asset-backed securities	—		5.2		—		5.2
Equity securities	721.5		—				721.5
Total	$	727.8	$	37.6	$	—	$	765.4