Consolidated Statements of Equity (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Equity issuance cost		$ 0.0	$ 9.5	$ 0.0
Common stock repurchases	[1]	$ 19.3

[1] Includes $19.3 in shares repurchased through our share repurchase program. Refer to Note 2, “Significant Accounting Policies,” for further information.