CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) AND REDEEMABLE NONCONTROLLING INTERESTS (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Class A Common Stock
Dividends declared per share (in USD per share)	$ 0.20	$ 0.20	$ 0.40	$ 0.40
Dividends paid per share (in USD per share)	0.20	0.20	0.40	0.40
Class B Common Stock
Dividends declared per share (in USD per share)	0.20	0.20	0.40	0.40
Dividends paid per share (in USD per share)	$ 0.20	$ 0.20	$ 0.40	$ 0.40