v3.22.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Related Party Transaction [Line Items]    
Due from related parties $ 162 $ 109
Due to related parties 17 17
BlackRock Mutual Funds and iShares ETFs [Member]    
Related Party Transaction [Line Items]    
Accounts receivable from related parties $ 1,300 $ 1,100