Revenue Recognition Change in Contract with Customer (Details) $ in Millions	12 Months Ended
	Feb. 02, 2019 USD ($)
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability, Revenue recognized	$ 871
Contract with Customer, Liability, Increase (decrease) due to acquisition	16	[1]
Contract with Customer, Liability, Revenue adjustments	$ (1)	[2]

[1] (1)Represents an increase in our contract liability balances due to our acquisition of GreatCall, primarily related to deferred revenue.

[2] (2)Includes changes in the measure of progress, changes in the estimate of the transaction price or contract modifications.