Acquisitions (Details) - USD ($) $ in Millions |
Oct. 18, 2018 |
Apr. 30, 2019 |
Jul. 31, 2018 |
|---|---|---|---|
| Business Acquisition [Line Items] | |||
| Goodwill | $ 308.8 | $ 238.4 | |
| BOFA International LTD | |||
| Business Acquisition [Line Items] | |||
| Business acquisition, percentage of voting interests acquired | 88.00% | ||
| Business combination, consideration transferred | $ 98.2 | ||
| Cash acquired | 2.2 | ||
| Net tangible assets | 12.2 | ||
| Intangibles acquired | 45.7 | ||
| Goodwill | 73.6 | ||
| Deferred tax liabilities | 8.1 | ||
| Assumed debt | $ 14.3 | ||
| Period after which exercise of options triggers purchase obligation (years) | 3 years | ||
| Remaining voting interest obligated to acquire (as a percentage) | 12.00% | ||
| BOFA International LTD | Minimum | |||
| Business Acquisition [Line Items] | |||
| Estimated useful lives of intangibles (in years) | 5 years | ||
| BOFA International LTD | Maximum | |||
| Business Acquisition [Line Items] | |||
| Estimated useful lives of intangibles (in years) | 15 years |