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Summary of Significant Accounting Policies (Restructuring Reserve) (Details) (Facility Closing, USD $)
In Millions, unless otherwise specified
 3 Months Ended
Apr. 03, 2015
May 02, 2014
Jan. 30, 2015
Facility Closing
      
Restructuring Reserve [Roll Forward]      
Beginng balance     $ 11us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember
Charges 2us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember		 1us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember		  
Ending balance $ 10us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember		   $ 11us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember