XML 91 R70.htm IDEA: XBRL DOCUMENT v3.22.0.1
Equity Securities - (Summary of Investments in Equity Securities, by Classification) (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]    
Marketable equity securities $ 657 $ 464
Non-Marketable Equity Securities 441 217
Equity method investments 78 69
Equity Securities $ 1,176 $ 750