Fair value measurements (Tables)

6 Months Ended

Jan. 31, 2018

Cash, Cash Equivalents and Marketable Securities

Assets and Liabilities Carried at Fair Value and Measured on Recurring Basis

The following tables provide the assets and liabilities carried at fair value and measured on a recurring basis at January 31, 2018 and July 31, 2017:

	Fair Value Measurement as of January 31, 2018
(in millions)	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Marketable Securities
Cash	$	53.5	$	-	$	-		$	53.5	$	53.5	$	-
Level 1:
Money market funds		34.2		-		-			34.2		34.2		-
Subtotal	$	87.7	$	-	$	-		$	87.7	$	87.7	$	-
Level 2:
U.S. agency securities	$	4.0	$	-	$	-		$	4.0	$	-	$	4.0
Non-U.S. government securities		11.5		-		-			11.5		-		11.5
Commercial paper		23.6		-		-			23.6		13.2		10.4
Corporate securities		47.3		-					47.3		-		47.3
Asset-backed securities		28.3		-		(0.1	)		28.2		1.0		27.2
Subtotal	$	114.7	$	-	$	(0.1	)	$	114.6	$	14.2	$	100.4
Total	$	202.4	$	-	$	(0.1	)	$	202.3	$	101.9	$	100.4

	Fair Value Measurement as of July 31, 2017
(in millions)	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Marketable Securities
Cash	$	46.7	$	-	$	-		$	46.7	$	46.7	$	-
Level 1:
Money market funds		38.4		-		-			38.4		38.4		-
Subtotal	$	85.1	$	-	$	-		$	85.1	$	85.1	$	-
Level 2:
U.S. Treasury securities	$	10.0	$	-	$	-		$	10.0	$	10.0	$	-
U.S. agency securities		7.0		-		-			7.0		7.0		-
Non-U.S. government securities		3.9		-		-			3.9		-		3.9
Commercial paper		30.1		-		-			30.1		27.2		2.9
Corporate securities		28.0		-		(0.01	)		28.0		-		28.0
Asset-backed securities		10.2		-		-			10.2		-		10.2
Subtotal	$	89.2	$	-	$	(0.01	)	$	89.2	$	44.2	$	45.0
Total	$	174.3	$	-	$	(0.01	)	$	174.3	$	129.3	$	45.0

Plan Assets for Deferred Compensation

Assets and Liabilities Carried at Fair Value and Measured on Recurring Basis

Plan assets for deferred compensation	As of		As of
	January 31,		July 31,
(in millions)	2018		2017
Level 1:
Plan assets for deferred compensation		5.1		4.7
Total	$	5.1	$	4.7

Foreign Currency Forward Contracts

Assets and Liabilities Carried at Fair Value and Measured on Recurring Basis

Foreign currency forward contracts	As of		As of
	January 31,		July 31,
(in millions)	2018		2017
Level 2:
Foreign currency forward contracts asset		0.5		0.6
Total	$	0.5	$	0.6