STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical)	12 Months Ended
	Dec. 31, 2023 participant $ / shares	Dec. 31, 2022 participant $ / shares	Dec. 31, 2021 $ / shares
Number of incentive compensation deferral plan participants | participant	5	4
Class A common stock
Dividends declared (in dollars per share)	$ 4.845	$ 4.52	$ 4.215
Class B common stock
Dividends declared (in dollars per share)	$ 726.75	$ 678.00	$ 632.25