Stock-Based Compensation - Summary of Changes in Status of Time-Based Awards (Details) - Time-based Awards	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Units
Non-vested at beginning of period (in shares) | shares	180,588
Granted (in shares) | shares	198,600
Vested (in shares) | shares	(19,950)
Forfeited (in shares) | shares	(14,037)
Non-vested at end of period (in shares) | shares	345,201
Weighted Average Grant Date Fair Value
Non-vested at beginning of period (in dollars per share) | $ / shares	$ 84.69
Granted (in dollars per share) | $ / shares	92.93
Vested (in dollars per share) | $ / shares	78.00
Forfeited (in dollars per share) | $ / shares	87.26
Non-vested at end of period (in dollars per share) | $ / shares	$ 89.71
CECONY
Units
Non-vested at beginning of period (in shares) | shares	147,415
Granted (in shares) | shares	166,539
Vested (in shares) | shares	(18,550)
Forfeited (in shares) | shares	(6,341)
Non-vested at end of period (in shares) | shares	289,063
Weighted Average Grant Date Fair Value
Non-vested at beginning of period (in dollars per share) | $ / shares	$ 85.10
Granted (in dollars per share) | $ / shares	93.38
Vested (in dollars per share) | $ / shares	78.00
Forfeited (in dollars per share) | $ / shares	88.47
Non-vested at end of period (in dollars per share) | $ / shares	$ 90.25