Income taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 25, 2022	Mar. 26, 2021	Mar. 25, 2022	Mar. 26, 2021	Jun. 25, 2021
Income Tax Disclosure [Abstract]
Liability for uncertain tax positions including accrued interest and penalties	$ 1.5		$ 1.5		$ 0.9
Corporate effective income tax rate	5.40%	4.10%	3.20%	3.80%

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

Name:	us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant