Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Millions, $ in Millions		Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive loss
Beginning balance (in shares) at Dec. 31, 2018			141.7
Beginning balance at Dec. 31, 2018		$ 1,191.7	$ 1.4	$ 2,325.0	$ (761.5)	$ (373.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(63.9)			(63.9)
Foreign currency translation adjustment		8.2				8.2
Derivative financial instruments, net of tax		(8.3)				(8.3)
Common stock issued for the Nexeo acquisition (in shares)	[1]		27.9
Common stock issued for the Nexeo acquisition	[1]	649.3	$ 0.3	649.0
Restricted stock units vested (in shares)			0.2
Restricted stock units vested		0.0
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(0.1)
Tax withholdings related to net share settlements of stock-based compensation awards		(2.0)		(2.0)
Stock-based compensation		6.0		6.0
Ending balance (in shares) at Mar. 31, 2019			169.7
Ending balance at Mar. 31, 2019		$ 1,781.0	$ 1.7	2,978.0	(822.2)	(376.5)
Beginning balance (in shares) at Dec. 31, 2019		168.7	168.7
Beginning balance at Dec. 31, 2019		$ 1,732.8	$ 1.7	2,968.9	(858.5)	(379.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		55.9			55.9
Foreign currency translation adjustment		(94.1)				(94.1)
Derivative financial instruments, net of tax		(16.1)				(16.1)
Restricted stock units vested (in shares)			0.2
Restricted stock units vested		0.0	$ 0.0
Tax withholdings related to net share settlements of stock-based compensation awards (in shares)			(0.1)
Tax withholdings related to net share settlements of stock-based compensation awards		(1.3)		(1.3)
Stock option exercises (in shares)			0.1
Stock option exercises		0.7		0.7
Stock-based compensation		$ 5.7		5.7
Ending balance (in shares) at Mar. 31, 2020		168.9	168.9
Ending balance at Mar. 31, 2020		$ 1,683.6	$ 1.7	$ 2,974.0	$ (802.6)	$ (489.5)

[1] Refer to “Note 3: Business combinations” for more information.