Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended						9 Months Ended
	Nov. 05, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Nov. 03, 2021
Subsequent Event
Common stock dividend declared (usd per share)		$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.085
Shares repurchased		$ 46.2						$ 46.2
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 13.0						$ 13.0
Subsequent Event
Subsequent Event
Common stock dividend declared (usd per share)	$ 0.01
Stock Repurchase Program, Authorized Amount									$ 150.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount									$ 163.0