XML 69 R55.htm IDEA: XBRL DOCUMENT v3.20.2
Investments (Schedule of Investments) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]    
Financial investments $ 177 $ 291
Equity method investments 243 156
Equity securities $ 53 $ 49