Concentration of Risk (Details) - Revenue - Supplier Concentration Risk	3 Months Ended	6 Months Ended
Sep. 30, 2018	Sep. 24, 2017	Sep. 30, 2018	Sep. 24, 2017
Largest wireless infrastructure suppliers
Concentration Risk
Concentration risk (as a percent)	17.00%	10.30%	15.60%	11.00%
Largest mobile device accessories suppliers
Concentration Risk
Concentration risk (as a percent)	7.80%	7.90%	7.90%	10.50%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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