STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Class A common stock
Dividends declared (in dollars per share)	$ 1.11	$ 1.11	$ 1.035	$ 1.035	$ 2.22	$ 2.070
Class B common stock
Dividends declared (in dollars per share)	$ 166.50	$ 166.50	$ 155.25	$ 155.25	$ 333.00	$ 310.50