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v3.19.3.a.u2

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 29, 2016 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |
Servicing Asset, Measurement Input |  | $ 0 |  |
Business Combination, Contingent Consideration, Liability |  | 43 |  |
Liability [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability, Current |  | 23 |  |
Paid [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability |  | $ 20 |  |
Lattice |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Contingent consideration | $ 60 |  |  |
Contingent consideration period | 4 years |  |  |
Lattice | Contingent Consideration |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Discount rate |  | 11.80% |  |
Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Deposit Assets |  | $ 38 | $ 0 |
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Contingent Consideration |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value |  | 22 | $ 35 | $ 29
AUM Value [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability, Measurement Input [Extensible List] |  | 3,300 |  |
Forecast [Member] | AUM Value [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability, Measurement Input [Extensible List] |  | $ 4,100 |  |

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