Stock-Based Compensation - Summary of Changes in Status of Time-Based Awards (Details) - Time-based Awards	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Units
Non-vested at beginning of period (in shares) | shares	345,201
Granted (in shares) | shares	200,550
Vested (in shares) | shares	(14,915)
Forfeited (in shares) | shares	(22,766)
Transferred (in shares) | shares	0
Non-vested at end of period (in shares) | shares	508,070
Weighted Average Grant Date Fair Value
Non-vested at beginning of period (in dollars per share) | $ / shares	$ 89.71
Granted (in dollars per share) | $ / shares	88.60
Vested (in dollars per share) | $ / shares	74.80
Forfeited (in dollars per share) | $ / shares	87.67
Transferred (in dollars per share) | $ / shares	0
Non-vested at end of period (in dollars per share) | $ / shares	$ 89.80
CECONY
Units
Non-vested at beginning of period (in shares) | shares	289,063
Granted (in shares) | shares	173,755
Vested (in shares) | shares	(14,015)
Forfeited (in shares) | shares	(18,938)
Transferred (in shares) | shares	(5,210)
Non-vested at end of period (in shares) | shares	424,655
Weighted Average Grant Date Fair Value
Non-vested at beginning of period (in dollars per share) | $ / shares	$ 90.25
Granted (in dollars per share) | $ / shares	88.72
Vested (in dollars per share) | $ / shares	74.80
Forfeited (in dollars per share) | $ / shares	87.86
Transferred (in dollars per share) | $ / shares	86.84
Non-vested at end of period (in dollars per share) | $ / shares	$ 90.28