CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Class A Common Stock
Dividend declared common stock, per share (in dollars per share)	$ 0.286	$ 0.264	$ 0.572	$ 0.528
Class B Common Stock
Dividend declared common stock, per share (in dollars per share)	$ 0.260	$ 0.240	$ 0.520	$ 0.480