STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical)	3 Months Ended						9 Months Ended
	Sep. 30, 2024 participant $ / shares	Jun. 30, 2024 $ / shares	Mar. 31, 2024 $ / shares	Sep. 30, 2023 participant $ / shares	Jun. 30, 2023 $ / shares	Mar. 31, 2023 $ / shares	Sep. 30, 2024 participant $ / shares	Sep. 30, 2023 participant $ / shares
Rabbi trust, number of incentive compensation deferral plan participants receiving distributions | participant	5			5			5	5
Class A common stock
Dividends declared (in dollars per share)	$ 1.275	$ 1.275	$ 1.275	$ 1.19	$ 1.19	$ 1.19	$ 3.825	$ 3.57
Class B common stock
Dividends declared (in dollars per share)	$ 191.25	$ 191.25	$ 191.25	$ 178.50	$ 178.50	$ 178.50	$ 573.75	$ 535.50