CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Previously Reported	Preferred Stock	Preferred Stock Previously Reported	Common Stock	Common Stock Previously Reported	Additional Paid-in Capital	Additional Paid-in Capital Previously Reported	Treasury Stock	Treasury Stock Previously Reported	Accumulated Deficit	Accumulated Deficit Previously Reported	Accumulated Other Comprehensive (Loss) Income	Accumulated Other Comprehensive (Loss) Income Previously Reported	Total Stockholders' Equity	Total Stockholders' Equity Previously Reported	Non-controlling Interests	Non-controlling Interests Previously Reported
Balance (in shares) at Dec. 31, 2015			2,000,000		229,464,157				0
Balance at Dec. 31, 2015	$ 2,273.3		$ 0.0		$ 2.3		$ 3,520.4		$ 0.0		$ (532.7)		$ (886.1)		$ 2,103.9		$ 169.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(76.7)										(73.7)				(73.7)		(3.0)
Other comprehensive income (loss), net of taxes	213.6												211.6		211.6		2.0
Issuance of common stock to former non-founder director for exercise of stock options (in shares)					7,642
Issuance of common stock to former non-founder director for exercise of stock options	0.0
Conversion of PDH Common Stock into common stock (in shares)					325,431
Conversion of PDH Common Stock into common stock	0.0						3.8								3.8		(3.8)
Issuance of common stock under ESPP (in shares)					136,060
Issuance of common stock under ESPP	0.9						0.9								0.9
Share based compensation expense	7.4						7.4								7.4
Issuance of common stock at $8.25 per share in the September 2016 Equity Offering (in shares)					48,787,878
Issuance of common stock at $8.25 per share in the September 2016 Equity Offering	402.5				$ 0.5		402.0								402.5
Issuance costs in connection with the September 2016 Equity Offering	(11.9)						(11.9)								(11.9)
Series B Convertible Preferred Stock settlement (in shares)					5,500,000
Series B Convertible Preferred Stock settlement	87.8						54.9				32.9				87.8
Changes in non-controlling interests	(7.1)						3.8								3.8		(10.9)
Balance (in shares) at Dec. 31, 2016			2,000,000		284,221,168				0
Balance at Dec. 31, 2016	2,889.8		$ 0.0		$ 2.8		3,981.3		$ 0.0		(573.5)		(674.5)		2,736.1		153.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(295.6)										(296.2)				(296.2)		0.6
Other comprehensive income (loss), net of taxes	256.1												252.5		252.5		3.6
Exercise/ vesting of share based compensation (in shares)					122,769				6,618
Exercise/ vesting of share based compensation	0.0						0.1		$ (0.1)
Conversion of PDH Common Stock into common stock (in shares)					2,923,436
Conversion of PDH Common Stock into common stock	0.0				$ 0.1		35.6								35.7		(35.7)
Issuance of common stock under ESPP (in shares)					138,566
Issuance of common stock under ESPP	1.3						1.3								1.3
Share based compensation expense	11.7						11.7								11.7
Changes in non-controlling interests	(3.3)						2.0								2.0		(5.3)
Balance (in shares) at Dec. 31, 2017			2,000,000	2,000,000	287,405,939	287,405,939			6,618	6,618
Balance at Dec. 31, 2017	2,860.0	$ 2,860.0	$ 0.0	$ 0.0	$ 2.9	$ 2.9	4,032.0	$ 4,032.0	$ (0.1)	$ (0.1)	(869.7)	$ (869.7)	(422.0)	$ (422.0)	2,743.1	$ 2,743.1	116.9	$ 116.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(319.9)										(324.4)				(324.4)		4.5
Other comprehensive income (loss), net of taxes	$ (370.7)												(336.2)		(336.2)		(34.5)
Issuance of common stock to former non-founder director for exercise of stock options (in shares)	20,425
Exercise/ vesting of share based compensation (in shares)					988,573				335,349
Exercise/ vesting of share based compensation	$ (3.3)						0.1		$ (3.4)						(3.3)
Conversion of PDH Common Stock into common stock (in shares)					793,063
Conversion of PDH Common Stock into common stock	0.0						9.9								9.9		(9.9)
Issuance of common stock under ESPP (in shares)					128,595
Issuance of common stock under ESPP	1.2						1.2								1.2
Share based compensation expense	18.9						18.9								18.9
Changes in non-controlling interests	(5.1)																(5.1)
Balance (in shares) at Dec. 31, 2018			2,000,000		289,316,170				341,967
Balance at Dec. 31, 2018	$ 2,181.1		$ 0.0		$ 2.9		$ 4,062.1		$ (3.5)		$ (1,195.4)		$ (756.9)		$ 2,109.2		$ 71.9