CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Class A Common Stock
Dividend declared common stock, per share (in dollars per share)	$ 0.308	$ 0.286	$ 0.616	$ 0.572
Class B Common Stock
Dividend declared common stock, per share (in dollars per share)	$ 0.280	$ 0.260	$ 0.560	$ 0.520