Financial Instruments and Risk Management (Derivative Notional Amounts) (Details) - USD ($) $ in Millions	8 Months Ended		12 Months Ended
	Sep. 12, 2015	Sep. 06, 2014	Jan. 03, 2015
Foreign exchange contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 194.0	$ 116.8	$ 141.6
Maximum remaining maturity of foreign currency derivatives	356 days	336 days	336 days
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 638.9	$ 422.4	$ 405.4