Income taxes (Effective Tax Rate) (Details)	12 Months Ended
Jul. 03, 2021	Jun. 27, 2020	Jun. 29, 2019
Reconciliation between federal statutory tax rate and effective tax rate
U.S. federal statutory rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal benefit	(2.20%)	4.60%	0.30%
Tax on foreign income, net of valuation allowances	(10.70%)	5.00%	(0.50%)
Establishment/release of valuation allowance, net of U.S. tax expense	2.10%	(28.50%)	(3.30%)
Change in unrecognized tax benefit reserves	14.30%	20.10%	18.30%
Tax audit settlements	0.40%	(5.60%)	1.00%
Impact of the Tax Cuts and Jobs Act (the Act) - transition tax			0.073
Impact of the Act - deferred tax effects			(5.80%)
Impact of the CARES Act	(8.40%)	10.20%
Impairment of investments, including goodwill	(22.40%)	56.50%	(8.20%)
Other, net	(5.80%)	(7.30%)	(4.60%)
Effective Income Tax Rate	(11.70%)	76.00%	25.50%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Publisher FASB
-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Percentage of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to increase (decrease) from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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