Cash and Cash Equivalents, Investments, and Funds Held for Customers (Tables)

12 Months Ended

Jul. 31, 2018

Cash and Cash Equivalents, Investments and Funds Held for Customers [Abstract]

Cash and cash equivalents, investments and funds held for customers by balance sheet classification

The following table summarizes our cash and cash equivalents, investments and funds held for customers by balance sheet classification at the dates indicated.

	July 31, 2018				July 31, 2017
(In millions)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Classification on balance sheets:
Cash and cash equivalents	$	1,464	$	1,464	$	529	$	529
Investments	253		252		247		248
Funds held for customers	368		367		372		372
Long-term investments	13		13		31		31
Total cash and cash equivalents, investments, and funds held for customers	$	2,098	$	2,096	$	1,179	$	1,180

Cash and cash equivalents, investments and funds held for customers by investment category

The following table summarizes our cash and cash equivalents, investments and funds held for customers by investment category at the dates indicated. See Note 2 for more information on our municipal auction rate securities.

	July 31, 2018				July 31, 2017
(In millions)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Type of issue:
Total cash and cash equivalents	$	1,631	$	1,631	$	701	$	701
Available-for-sale debt securities:
Municipal bonds	31		31		63		63
Municipal auction rate securities	—		—		15		15
Corporate notes	414		412		381		382
U.S. agency securities	9		9		3		3
Total available-for-sale debt securities	454		452		462		463
Other long-term investments	13		13		16		16
Total cash and cash equivalents, investments, and funds held for customers	$	2,098	$	2,096	$	1,179	$	1,180

Available-for-sale debt securities classified by the stated maturity date of the security

The following table summarizes our available-for-sale debt securities classified by the stated maturity date of the security at the dates indicated.

	July 31, 2018				July 31, 2017
(In millions)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	250	$	250	$	209	$	209
Due within two years	117		116		164		164
Due within three years	66		65		59		60
Due after three years	21		21		30		30
Total available-for-sale debt securities	$	454	$	452	$	462	$	463