Fair Value Measurements (Tables)

12 Months Ended

Mar. 31, 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 March 31, 2018 and April 1, 2017:

	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 fund	—		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

	April 1, 2017
(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	$	298,307	$	—	$	—	$	298,307
Financial institution securities	—		158,962		—		158,962
Non-financial institution securities	—		205,322		—		205,322
U.S. government and agency securities	2,998		50,984		—		53,982
Foreign government and agency securities	—		177,310		—		177,310
Short-term investments:
Financial institution securities	—		189,835		—		189,835
Non-financial institution securities	—		203,938		—		203,938
U.S. government and agency securities	31,732		44,820		—		76,552
Foreign government and agency securities	—		144,811		—		144,811
Mortgage-backed securities	—		1,115,403		—		1,115,403
Debt mutual funds	—		34,068		—		34,068
Bank loans	—		154,014		—		154,014
Asset-backed securities	—		218,170		—		218,170
Commercial mortgage-backed securities	—		217,971		—		217,971
Long-term investments:
Mortgage-backed securities	—		60,099		—		60,099
Debt mutual fund	—		54,608		—		54,608
Asset-backed securities	—		1,581		—		1,581
Derivative financial instruments, net	—		1,661		—		1,661
Total assets measured at fair value	$	333,037	$	3,033,557	$	—	$	3,366,594

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

The following table is a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

(In thousands)	March 31, 2018		April 1, 2017
Balance as of beginning of period	$	—	$	9,977
Total realized and unrealized gains (losses):
Included in other comprehensive income (loss)	—		523
Sales and settlements, net	—		(10,500		)
Balance as of end of period	$	—	$	—