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Fair Value Measurements - Fair Value Measurement (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Assets    
Derivative contracts, at fair value (asset) $ 363 $ 812
Liabilities    
Securities sold, not yet purchased, at fair value 5,654 6,495
Derivative contracts, at fair value (liability) 608 691
Estimated fair value 46  
Recurring measurement    
Assets    
Investments 6,523 6,722
Derivative contracts, at fair value (asset) 363 812
Assets, Fair Value Disclosure 6,886 7,534
Liabilities    
Securities sold, not yet purchased, at fair value 5,654 6,495
Derivative contracts, at fair value (liability) 608 691
Other liabilities 582 692
Financial and Nonfinancial Liabilities, Fair Value Disclosure 6,844 7,878
Recurring measurement | Level 1    
Assets    
Investments 5,291 5,538
Assets, Fair Value Disclosure 5,291 5,538
Liabilities    
Securities sold, not yet purchased, at fair value 5,477 6,326
Financial and Nonfinancial Liabilities, Fair Value Disclosure 5,477 6,326
Recurring measurement | Level 2    
Assets    
Investments 1,190 1,142
Derivative contracts, at fair value (asset) 363 812
Assets, Fair Value Disclosure 1,553 1,954
Liabilities    
Securities sold, not yet purchased, at fair value 177 169
Derivative contracts, at fair value (liability) 608 691
Other liabilities 582 692
Financial and Nonfinancial Liabilities, Fair Value Disclosure 1,367 1,552
Recurring measurement | Level 3    
Assets    
Investments 42 42
Assets, Fair Value Disclosure $ 42 $ 42