Equity Based Employee Benefit Plans Additional Disclosures (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 15	$ 15	$ 47	$ 49
Unamortized Stock Compensation Expense Cost Not yet Recognized	$ 82		$ 82
Performance Shares [Abstract]
Change in Performance Share Awards Earned Due to Performance			25.00%
Share-based Compensation Arrangement, Performance Shares, Vesting Based on Operating Income Growth Targets			50.00%
Vesting of Performance Shares, Vesting Tranche Based on Achievement of Certain Return on Net Assets Percentage Targets			50.00%
Share-based Compensation Arrangement, Performance Shares, Vesting Based on Sales Growth Metrics			50.00%
Share-based Compensation Arrangement, Performance Shares, Actual Change in Performance Share Award Earned			25.00%
Employee Stock Purchase Plan [Abstract]
Stock Issued During Period, Shares, Employee Stock Ownership Plan			2.1	1.3
April 2013 Grant [Member]
Performance Shares [Abstract]
Shares issued pursuant to the Amended and Restated Employee Stock Purchase Plan			0.8
March 2014 and March 2015 PS Grants [Member]
Performance Shares [Abstract]
Target Number of Shares in Tranche Each Year			0.9
Aggregate Grant Date Fair Value of Shares in Tranche			$ 7
Minimum [Member]
Performance Shares [Abstract]
Performance Shares Payout, as a Percentage of Target			25.00%
Maximum [Member]
Performance Shares [Abstract]
Performance Shares Payout, as a Percentage of Target			200.00%
Share-based Compensation Award, Tranche One [Member] | April 2016 Grant [Member]
Performance Shares [Abstract]
Target Number of Shares in Tranche Each Year			1.0
Aggregate Grant Date Fair Value of Shares in Tranche			$ 9