Unearned Revenue and Performance Obligations - Narrative (Details) - USD ($) $ in Billions |
12 Months Ended | ||
---|---|---|---|
Jan. 31, 2022 |
Jan. 31, 2021 |
Jan. 31, 2020 |
|
Revenue from Contract with Customer [Abstract] | |||
Subscription revenue recognized that was included in total unearned revenue balance at beginning of period | $ 2.5 | $ 2.2 | $ 1.8 |