Fair Value Measurements (Tables)

3 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis as of June 30, 2018 and March 31, 2018:

	June 30, 2018
(In thousands)	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
Assets
Cash equivalents:
Money market funds	$	458,706	$	—	$	—	$	458,706
Financial institution securities	—		349,850		—		349,850
Non-financial institution securities	—		350,624		—		350,624
U.S. government and agency securities	114,664		206,945		—		321,609
Foreign government and agency securities	—		130,622		—		130,622
Short-term investments:
Financial institution securities	—		249,982		—		249,982
Non-financial institution securities	—		263,922		—		263,922
U.S. government and agency securities	3,647		96,105		—		99,752
Foreign government and agency securities	—		43,783		—		43,783
Mortgage-backed securities	—		796,953		—		796,953
Asset-backed securities	—		89,028		—		89,028
Commercial mortgage-backed securities	—		143,389		—		143,389
Long-term investments:
Debt mutual funds	—		85,633		—		85,633
Marketable equity securities	6,067		—		—		6,067
Total assets measured at fair value	$	583,084	$	2,806,836	$	—	$	3,389,920
Liabilities
Derivative financial instruments, net	$	—	$	41,289	$	—	$	41,289
Total liabilities measured at fair value	$	—	$	41,289	$	—	$	41,289
Net assets measured at fair value	$	583,084	$	2,765,547	$	—	$	3,348,631

	March 31, 2018
(In thousands)	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
Assets
Cash equivalents:
Money market funds	$	1,291,891	$	—	$	—	$	1,291,891
Financial institution securities	—		359,901		—		359,901
Non-financial institution securities	—		242,904		—		242,904
U.S. government and agency securities	996		34,999		—		35,995
Foreign government and agency securities	—		179,957		—		179,957
Short-term investments:
Financial institution securities	—		75,000		—		75,000
Non-financial institution securities	—		81,939		—		81,939
U.S. government and agency securities	3,639		19,008		—		22,647
Mortgage-backed securities	—		844,397		—		844,397
Asset-backed securities	—		91,389		—		91,389
Commercial mortgage-backed securities	—		152,870		—		152,870
Long-term investments:
Debt mutual funds	—		89,670		—		89,670
Marketable equity securities	8,226				—		8,226
Total assets measured at fair value	$	1,304,752	$	2,172,034	$	—	$	3,476,786
Liabilities
Derivative financial instruments, net	$	—	$	26,091	$	—	$	26,091
Total liabilities measured at fair value	$	—	$	26,091	$	—	$	26,091
Net assets measured at fair value	$	1,304,752	$	2,145,943	$	—	$	3,450,695

Changes in Level 3 instruments measured at fair value on a recurring basis

As of June 30, 2018 and July 1, 2017, the Company held no marketable securities measured at fair value using Level 3 inputs.