Financial Instruments and Risk Management (Fair Value of Debt) (Details) - USD ($) $ in Millions	Sep. 12, 2015	Jan. 03, 2015	Sep. 06, 2014
Fair Value Disclosures [Abstract]
Long-term debt, including current maturities, excluding capital leases	$ 825.0	$ 900.2	$ 1,095.9
Fair value, long-term debt, including current maturities	$ 846.2	$ 928.4	$ 1,135.3

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant