Indebtedness (Details) £ in Millions, $ in Millions		12 Months Ended
	Nov. 30, 2005 GBP (£)	Jan. 02, 2016 USD ($)	Jan. 29, 2015 USD ($)
Debt Instrument [Line Items]
Description of Lessee Leasing Arrangements, Capital Leases		capital lease obligations are primarily related to the procurement of hardware and health care devices, and generally have a term of five years
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Line of Credit Facility, Expiration Date		Oct. 29, 2020
Line of Credit Facility, Ability to Increase Borrowing Capacity, Maximum Amount		$ 200
Line of Credit Facility, Interest Rate Description		Interest is payable at a rate based on prime, LIBOR, or the U.S. federal funds rate, plus a spread that varies depending on the leverage ratios maintained.
Line of Credit Facility, Covenant Terms		The agreement provides certain restrictions on our ability to borrow, incur liens, sell assets and pay dividends and contains certain cash flow and liquidity covenants.
Letters of Credit Outstanding, Amount		$ 16
Line of Credit Facility, Remaining Borrowing Capacity		$ 84
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 500
Debt Instrument, Restrictive Covenants		The Master Note Purchase Agreement contains certain leverage and interest coverage ratio covenants and provides certain restrictions on our ability to borrow, incur liens, sell assets, and other customary terms
Series 2015-A [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 225
Debt Instrument, Interest Rate, Stated Percentage			3.18%
Debt Instrument, Frequency of Periodic Payment		payable semiannually
Debt Instrument, Date of First Required Payment		Aug. 15, 2015
Debt Instrument, Maturity Date		Feb. 15, 2022
Series 2015-B [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 200
Debt Instrument, Interest Rate, Stated Percentage			3.58%
Debt Instrument, Maturity Date		Feb. 14, 2025
Series 2015-C [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 75
Debt Instrument, Frequency of Periodic Payment		payable quarterly
Debt Instrument, Date of First Required Payment		May 15, 2015
Debt Instrument, Maturity Date		Feb. 15, 2022
Note Agreement, 5.54% [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount | £	£ 65
Debt Instrument, Interest Rate, Stated Percentage	5.54%
Debt Instrument, Frequency of Periodic Payment	seven
Debt Instrument, Date of First Required Payment	Nov. 30, 2009
Other [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Sep. 30, 2025
London Interbank Offered Rate (LIBOR) [Member] | Series 2015-C [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis		Adjusted LIBOR Rate
Debt Instrument, Interest Rate During Period		1.36%