STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Class A common stock
Dividends declared (in dollars per share)	$ 1.19	$ 1.19	$ 1.11	$ 1.11	$ 2.38	$ 2.22
Class B common stock
Dividends declared (in dollars per share)	$ 178.50	$ 178.50	$ 166.50	$ 166.50	$ 357.00	$ 333.00