Consolidated Balance Sheets (Parentheticals) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Common Stock, Par Value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,666,667,000	1,666,667,000
Common Stock, Shares, Outstanding	748,369,000	748,577,000
Accumulated Depreciation	$ (3,406,000,000)	$ (3,326,000,000)	$ (2,970,000,000)
EID [Member]
Common Stock, Par Value	$ 0.30	$ 0.30	$ 0.30
Common Stock, Shares Authorized	1,800,000,000	1,800,000,000	1,800,000,000
Common Stock, Shares, Outstanding	200	200	100
Accumulated Depreciation	$ (3,406,000,000)	$ (3,326,000,000)	$ (2,970,000,000)
EID [Member] | $4.50 Series Preferred Stock [Member]
Preferred Stock, Par Value	$ 0	$ 0	$ 0
Preferred Stock, Shares Authorized	23,000,000	23,000,000	23,000,000
Preferred Stock, Shares Issued	1,673,000	1,673,000	1,673,000
Preferred Stock, Redemption Amount	$ 120	$ 120	$ 120
EID [Member] | $3.50 Series Preferred Stock [Member]
Preferred Stock, Par Value	$ 0.00	$ 0.00	$ 0.00
Preferred Stock, Shares Authorized	23,000,000	23,000,000	23,000,000
Preferred Stock, Shares Issued	700,000	700,000	700,000
Preferred Stock, Redemption Amount	$ 102	$ 102	$ 102