Balance Sheets - MEC (Parenthetical) - $ / shares	Dec. 31, 2022	Dec. 31, 2021
Common stock, shares authorized	115,000,000	115,000,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares issued	76,000,000	76,000,000
Common stock, shares outstanding	76,000,000	76,000,000
MEC
Common stock, shares authorized	350,000,000	350,000,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares issued	71,000,000	71,000,000
Common stock, shares outstanding	71,000,000	71,000,000