Summary of Significant Accounting Policies - Goodwill & Intangible Assets (Details) - USD ($) $ in Millions	Feb. 02, 2019	Feb. 03, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 373
Finite-Lived Intangible Assets, Accumulated Amortization	23
Goodwill	915	$ 425
Goodwill, gross carrying amount	1,590	1,100
Goodwill, cumulative impairment	(675)	$ (675)
Indefinite-lived intangible assets (excluding goodwill)	18
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	68
Finite-Lived Intangible Assets, Amortization Expense, Year Two	68
Finite-Lived Intangible Assets, Amortization Expense, Year Three	67
Finite-Lived Intangible Assets, Amortization Expense, Year Four	67
Finite-Lived Intangible Assets, Amortization Expense, Year Five	48
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	32
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	258
Finite-Lived Intangible Assets, Accumulated Amortization	16
Tradename
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	63
Finite-Lived Intangible Assets, Accumulated Amortization	3
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	52
Finite-Lived Intangible Assets, Accumulated Amortization	$ 4