STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class A common stock
Dividends declared (in dollars per share)	$ 4.215	$ 5.93	$ 3.665
Class B common stock
Dividends declared (in dollars per share)	$ 632.25	$ 889.50	$ 549.75