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Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Jul. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Total operating income | $ 209 | $ 10 |
Revenue recognized | $ 399 | 355 |
Description of timing | 12 months |  |
Long-term deferred revenue | $ 9 |  | $ 13
Notes receivable | 26 |  | $ 40
Segment Reconciling Items |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Expenses | 432 | 426 |
Segment Reconciling Items | Segment Reclass | Small Business & Self-Employed |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Expenses |  | (43) |
Segment Reconciling Items | Segment Reclass | Consumer |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Expenses |  | (25) |
Segment Reconciling Items | Segment Reclass | ProConnect |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Expenses |  | (3) |
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income | 761 | 555 |
Operating Segments | Small Business & Self-Employed |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income | 767 | 593 |
Operating Segments | Consumer |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income | 4 | (20) |
Operating Segments | ProConnect |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income | $ (10) | (18) |
Operating Segments | Segment Reclass | Small Business & Self-Employed |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income |  | 43 |
Operating Segments | Segment Reclass | Consumer |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income |  | 25 |
Operating Segments | Segment Reclass | ProConnect |  |  |
Segment Reporting Information [Line Items] |  |  |
Total operating income |  | $ 3 |

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