XML 49 R38.htm IDEA: XBRL DOCUMENT v3.20.2
Variable Interest Entities (Narrative) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Variable Interest Entities [Abstract]    
Voluntary repurchases and substitutions $ 11.1 $ 8.4