Balance Sheets - MEC (Parenthetical) - $ / shares	Dec. 31, 2024	Dec. 31, 2023
Common stock, shares authorized (in shares)	100	115,000,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares issued (in shares)	1	75,627,913
Common stock, shares outstanding (in shares)	1	75,627,913
MEC
Common stock, shares authorized (in shares)	350,000,000	350,000,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares issued (in shares)	71,000,000	71,000,000
Common stock, shares outstanding (in shares)	71,000,000	71,000,000