Fixed Assets - Composition of Partnership Equipment, Property and Improvements (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 2,055	$ 1,856
Less: accumulated depreciation	1,192	1,110
Less: accumulated software amortization	138	126
Fixed Assets Net, Total	725	620
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	1,115	1,050
Equipment, Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	598	569
Software [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	295	194
Land [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 47	$ 43