Revenue Recognition Change in Contract with Customer (Details) $ in Millions	9 Months Ended
	Nov. 03, 2018 USD ($)
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability, Revenue recognized	$ 729
Contract with Customer, Liability, Increase (decrease) due to acquisition	14	[1]
Contract with Customer, Liability, Revenue adjustments	$ 2	[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.