Financial Instruments (Tables)

12 Months Ended

Jun. 24, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Available-for-sale investments [Table Text Block]

Fair values were as follows:

	June 24, 2017									June 25, 2016
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value		Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Estimated Fair Value
	(in thousands)
Available-for-sale investments
U.S. treasury bills	$	499,952	$	—	$	(1,234	)	$	498,718	$	124,950	$	489	$	—	$	125,439
Total available-for-sale investments	$	499,952	$	—	$	(1,234	)	$	498,718	$	124,950	$	489	$	—	$	125,439

Schedule of Long-term Debt Instruments [Table Text Block]

The following table summarizes the Company's outstanding debt obligations:

	June 24, 2017			June 25, 2016
	(in thousands)
3.450% fixed rate notes due June 2027	$	500,000		$	—
2.5% fixed rate notes due November 2018	500,000			500,000
3.375% fixed rate notes due March 2023	500,000			500,000
Short-term credit agreement	—			250,000
Total outstanding debt	1,500,000			1,250,000
Less: Current portion (included in “Current portion of debt”)	—			(249,717		)
Less: Reduction for unamortized discount and debt issuance costs	(12,322		)	(10,193		)
Total long-term debt	$	1,487,678		$	990,090