Investments (Tables)

9 Months Ended

Jun. 30, 2018

Investments [Abstract]

Investment

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

	June 30, 2018		September 30, 2017
Certificates of deposit and time deposits	$	477.9	$	1,005.3
Commercial paper	—		20.3
Corporate debt securities	160.3		199.4
Government securities	65.8		116.8
Asset-backed securities	30.0		45.8
Total	$	734.0	$	1,387.6

Investments Classified by Contractual Maturity Date

The table below summarizes the contractual maturities of our investments as of June 30, 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	$	548.6
Due in one to five years	185.4
Total	$	734.0

Fair Value, by Balance Sheet Grouping

Classification of our available-for-sale investments as current or noncurrent is based on the nature of the investment and when the investment is reasonably expected to be realized. These investments were included in the following line items within the Condensed Consolidated Balance Sheet (in millions):

	June 30, 2018		September 30, 2017
Short-term investments	$	548.6	$	1,124.6
Other assets	185.4		263.0
Total	$	734.0	$	1,387.6

Fair Value Measurements, Recurring and Nonrecurring

Fair values of our investments were (in millions):

	June 30, 2018
	Level 1		Level 2		Level 3		Total
Assets
Certificates of deposit and time deposits	$	—	$	477.9	$	—	$	477.9
Commercial paper	—		—		—		—
Corporate debt securities	—		160.3		—		160.3
Government securities	55.7		10.1		—		65.8
Asset-backed securities	—		30.0		—		30.0
Total assets	$	55.7	$	678.3	$	—	$	734.0
Other current liabilities
Forward contract	$	—	$	—	$	76.8	$	76.8
Total liabilities	$	—	$	—	$	76.8	$	76.8

	September 30, 2017
	Level 1		Level 2		Level 3		Total
Certificates of deposit and time deposits	$	—	$	1,005.3	$	—	$	1,005.3
Commercial paper	—		20.3		—		20.3
Corporate debt securities	—		199.4		—		199.4
Government securities	98.9		17.9		—		116.8
Asset-backed securities	—		45.8		—		45.8
Total	$	98.9	$	1,288.7	$	—	$	1,387.6

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 investment liability (in millions):

	Fair Value
Agreement commencement June 11, 2018	$	(96.1	)
Unrealized gains	19.3
Balance June 30, 2018	$	(76.8	)