CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY/ACCUMULATED NET PARENT INVESTMENT - USD ($) shares in Millions, $ in Millions	Total	Accumulated net parent investment	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Noncontrolling interest	Class A common stock Common Stock	Class B common stock Common Stock
Stockholders' equity, beginning balance at Dec. 31, 2018	$ 138.6	$ 140.8	$ 0.0	$ 0.0	$ (2.2)	$ 0.0	$ 0.0	$ 0.0
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2018							0.0	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13.7
Net income	13.7	13.7
Transactions with Parent and affiliates, net	(6.2)	(6.2)
Currency translation	1.9				1.9
Stockholders' equity, ending balance at Mar. 31, 2019	160.4	$ 160.7	0.0	0.0	(0.3)	0.0	$ 0.0	$ 0.0
Stockholders' equity, ending balance (in shares) at Mar. 31, 2019							0.0	0.0
Stockholders' equity, beginning balance at Dec. 31, 2019	277.5		41.7	12.0	0.3	223.4	$ 0.0	$ 0.1
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2019							22.7	103.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4.4
Net income	31.1			4.4		26.7
Stock-based compensation	0.1		0.2			(0.1)
Currency translation	(0.8)				(0.2)	(0.6)
Stockholders' equity, ending balance at Mar. 31, 2020	$ 307.9		$ 41.9	$ 16.4	$ 0.1	$ 249.4	$ 0.0	$ 0.1
Stockholders' equity, ending balance (in shares) at Mar. 31, 2020							22.7	103.5