Deferred Costs	12 Months Ended
	Jan. 31, 2021
Deferred Costs [Abstract]
Deferred Costs	Deferred CostsDeferred costs, which consists of deferred sales commissions, were $42 million and $36 million as of January 31, 2021 and January 31, 2020, respectively. Amortization expense for the deferred costs included in sales and marketing expenses in the consolidated statements of comprehensive income was $21 million, $21 million, and $18 million for the fiscal years ended January 31, 2021, 2020, and 2019, respectively. There have been no impairment losses recorded in relation to the costs capitalized for any period presented.