Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Apr. 01, 2017	Apr. 02, 2016
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			$ 689.3
Other comprehensive income (loss) before reclassification			79.9
Amounts reclassified from accumulated other comprehensive income			(184.0)
Net change in Accumulated other comprehensive (loss) income	$ (22.8)	$ 13.3	(104.1)	$ 144.9
Balance at the end of the period	771.2		771.2
Income tax expense impact from realized gain on sale of marketable equity securities			0.0
Tax impact of amortization of actuarial gains (losses)			0.0
Total
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			10.0
Balance at the end of the period	(94.1)		(94.1)
Unrealized gains (losses) on available-for-sale investments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			104.5
Other comprehensive income (loss) before reclassification			93.0
Amounts reclassified from accumulated other comprehensive income			(185.4)
Net change in Accumulated other comprehensive (loss) income			(92.4)
Balance at the end of the period	12.1		12.1
Foreign currency translation adjustments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			(70.1)
Other comprehensive income (loss) before reclassification			(13.1)
Amounts reclassified from accumulated other comprehensive income			0.0
Net change in Accumulated other comprehensive (loss) income			(13.1)
Balance at the end of the period	(83.2)		(83.2)
Change in unrealized components of defined benefit obligations, net of tax
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			(24.4)
Other comprehensive income (loss) before reclassification			0.0
Amounts reclassified from accumulated other comprehensive income			1.4
Net change in Accumulated other comprehensive (loss) income			1.4
Balance at the end of the period	$ (23.0)		$ (23.0)