Fair Value Measurements - Nonrecurring (Details) - Fair Value, Measurements, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] - Continuing Operations [Member] - USD ($) $ in Millions		3 Months Ended
		Apr. 29, 2017	Apr. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, impairments (non-restructuring)		$ 5	$ 5
Property and equipment, remaining net carrying value	[1]	0	0
Total Impairments		5	12
Total remaining net carrying value		0	0
Property and equipment write-downs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment, impairments (restructuring)	[2]	0	7
Property and equipment, remaining net carrying value	[1],[2]	$ 0	$ 0

[1] Remaining net carrying value approximates fair value. Because assets subject to long-lived asset impairment are not measured at fair value on a recurring basis, certain fair value measurements presented in the table may reflect values at earlier measurement dates and may no longer represent the fair values at April 29, 2017, and April 30, 2016.

[2] See Note 5, Restructuring Charges, for additional information.