Equity (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Nov. 04, 2020
Class of Stock [Line Items]
Remaining authorized for share repurchases	$ 92,600,000
Class A
Class of Stock [Line Items]
Stock repurchased (in shares)	1,309,000
Average price paid per share (in dollars per share)	$ 22.38
Class C
Class of Stock [Line Items]
Stock repurchased (in shares)	50,164,423
Average price paid per share (in dollars per share)	$ 18.93
Aggregate purchase price	$ 979,200,000
Subsequent event
Class of Stock [Line Items]
Amount authorized to be repurchased		$ 1,000,000,000.0