Other Assets - Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Other Assets
Other investments	$ 3,033	$ 3,250
Property, Plant and Equipment, Net	656	635
Software	527	445
Intangible assets	531	444
OREO	1	1
Other	5,452	4,845
Total other assets	$ 10,200	$ 9,620