Amount of the cumulative effect on retained earnings net of related income tax effect.

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Basis of presentation and new accounting pronouncements (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Mar. 30, 2019	Sep. 29, 2018	Jun. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings		$ 2,935,077		$ 3,235,894
Other assets		$ 192,979		$ 262,552
ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect on retained earnings	$ 2,000
ASU 2016-16
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings			$ (5,800)
Other assets			$ (5,800)