Revenue - Schedule of Estimated Technology Services Revenue Expected to Be Recognized in Future, Related to Unsatisfied Portion of Performance Obligations (Detail 1) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Technology Services Revenue [Member] | ||
| Schedule of Investment Advisory Administration Fees and Securities Lending Revenue and Performance Fees by Type [line Items] | ||
| Revenue, Remaining Performance Obligation | $ 239 | $ 231 |