Consolidated Balance Sheets Balance Sheets (Parenthetical) - MEC - $ / shares shares in Millions	Mar. 31, 2020	Dec. 31, 2019
Common stock, par value	$ 0.00	$ 0.00
Common stock, shares authorized	115	115
Common stock, shares issued	76	77
Common stock, shares outstanding	76	77
MidAmerican Energy Company [Member]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	350	350
Common stock, shares issued	71	71
Common stock, shares outstanding	71	71