Investments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Dec. 27, 2014	Dec. 27, 2014	Jun. 28, 2014	Dec. 28, 2013
Schedule of Equity Method Investments [Line Items]
Available-for-sale Securities			$ 20.7us-gaap_AvailableForSaleSecurities
Unrealized loss on equity method investments	(3.1)us-gaap_GainLossOnInvestments	(6.3)us-gaap_GainLossOnInvestments
Loss from Equity Method Investments		1.3
Unrealized Gain (Loss) on Investments [Abstract]
Equity securities, at cost less impairments			17.1	17.1
Gross unrealized gains	3.4	3.4	3.8
Gross unrealized losses	(0.5)	(0.5)	(0.2)
Estimated fair value of equity securities	20.0	20.0	20.7
Available-for-sale Securities [Member]
Schedule of Equity Method Investments [Line Items]
Available-for-sale Securities	20.0	20.0	5.9
Other Noncurrent Assets [Member]
Schedule of Equity Method Investments [Line Items]
Available-for-sale Securities			14.8
Cost Method Investments	8.4	8.4	9.0
Equity Method Investments	$ 52.5	$ 52.5	$ 57.4

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.

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This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of equity securities categorized neither as held-to-maturity nor as trading.

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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

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