EID Segment FN Segment Asset Reconciliation (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Segment Reporting Information [Line Items]
Segment Assets	$ 37,390	$ 38,879	$ 39,828
Corporate Assets	4,790	3,518	4,094
Total Assets	42,180	42,397	43,922
EID [Member]
Segment Reporting Information [Line Items]
Corporate Assets			4,101
Total Assets	$ 42,180	$ 42,397	$ 43,929