Intangible Assets - Additional Information (Detail) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Jul. 31, 2020 |
Jul. 31, 2019 |
Jul. 31, 2018 |
Dec. 31, 2019 |
|
| Schedule Of Intangible Assets [Line Items] | ||||
| Impairment of intangible assets | $ 0 | $ 0 | $ 0 | |
| eFront [Member] | Customer Relationships [Member] | ||||
| Schedule Of Intangible Assets [Line Items] | ||||
| Finite-lived intangible assets, acquired | $ 400,000,000 | |||
| Acquired finite-lived intangible assets weighted-average useful life | 10 years | |||
| eFront [Member] | Technology-Related [Member] | ||||
| Schedule Of Intangible Assets [Line Items] | ||||
| Finite-lived intangible assets, acquired | $ 203,000,000 | |||
| Acquired finite-lived intangible assets weighted-average useful life | 8 years | |||
| eFront [Member] | Trade Names [Member] | ||||
| Schedule Of Intangible Assets [Line Items] | ||||
| Finite-lived intangible assets, acquired | $ 14,000,000 | |||
| Acquired finite-lived intangible assets weighted-average useful life | 4 years |