Investments - Cost-Method (Details) - USD ($)	3 Months Ended
Jul. 01, 2018	Jul. 02, 2017	Apr. 01, 2018
Investments, Debt and Equity Securities [Abstract]
Original cost of cost-method investment	$ 25,300,000		$ 27,300,000
Impairment charge	$ 2,000,000	$ 0

Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84241550&loc=SL75117546-209714

Name:	us-gaap_EquitySecuritiesFvNiRealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration