CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Class A Common Stock
Dividend declared common stock, per share (in dollars per share)	$ 0.286	$ 0.264
Class B Common Stock
Dividend declared common stock, per share (in dollars per share)	$ 0.260	$ 0.240