Acquisition - Summary of Initial and Revised Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - eFront [Member] - USD ($) $ in Billions |
12 Months Ended | |
|---|---|---|
May 10, 2019 |
Dec. 31, 2019 |
|
| Business Acquisition [Line Items] | ||
| Settlement of outstanding debt | $ 0.2 | |
| Customer Relationships [Member] | ||
| Business Acquisition [Line Items] | ||
| Finite-lived intangible assets, weighed-average estimated useful life | 10 years | 10 years |
| Technology-Related [Member] | ||
| Business Acquisition [Line Items] | ||
| Finite-lived intangible assets, weighed-average estimated useful life | 8 years | 8 years |
| Trade Names [Member] | ||
| Business Acquisition [Line Items] | ||
| Finite-lived intangible assets, weighed-average estimated useful life | 4 years | 4 years |