Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustments	Accumulated Other Comprehensive Income (Loss), Cash Flow & Net Investment Hedges	Accumulated Other Comprehensive Income (Loss), Employee Benefit Plans	Non-controlling Interests	Series A Preferred Stock	Series A Preferred Stock Preferred Stock	Series A Preferred Stock Common Stock	Series A Preferred Stock Additional Paid-In Capital	Series B Preferred Stock	Series B Preferred Stock Preferred Stock	Series B Preferred Stock Common Stock	Series B Preferred Stock Additional Paid-In Capital	Series C Preferred Stock	Series C Preferred Stock Preferred Stock	Series C Preferred Stock Common Stock	Series C Preferred Stock Additional Paid-In Capital
Balance (in shares) at Dec. 31, 2012		18,003	45								74				0
Balance at Dec. 31, 2012	$ 245.2	$ 0.0	$ (0.1)	$ 262.7	$ (60.2)						$ 42.8				$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(48.5)				(48.5)
Other comprehensive income (loss), net of $7.6 total tax effect	0.0
Tax withholdings on restricted shares and other issuances of common stock (in shares)		192
Tax withholdings on restricted shares and other issuances of common stock	(1.8)			(1.8)
Conversion of preferred stock to common stock (in shares)		14									0
Conversion of preferred stock to common stock	0.0			0.1							$ (0.1)
Proceeds from common stock offering, net of issuance costs (in shares)		11,148
Proceeds from common stock offering, net of issuance costs	239.5			239.5
Issuance of common stock for acquisitions (in shares)		617
Issuance of common stock for acquisitions	10.4			10.4
Issuance of common stock upon conversion of convertible senior notes, net of tax (in shares)		609
Issuance of common stock upon conversion of convertible senior notes, net of tax	9.4			9.4
Dividend paid	(3.0)				(3.0)
Stock compensation expense	4.7			4.7
Balance (in shares) at Dec. 31, 2013		30,583	45								74				0
Balance at Dec. 31, 2013	455.9	$ 0.0	$ (0.1)	525.0	(111.7)						$ 42.7				$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(63.6)				(63.6)
Other comprehensive income (loss), net of $7.6 total tax effect	0.0
Exercise of warrants and stock options and other (in shares)		293
Exercise of warrants and stock options and other	(4.5)			(4.5)
Conversion of preferred stock to common stock (in shares)											1	120			400	12,128
Conversion of preferred stock to common stock										$ 0.0	$ (0.5)		$ 0.5	$ 0.0	$ (363.6)		$ 363.6
Proceeds from issuance of preferred stock, net of issuance costs (in shares)															400
Proceeds from issuance of preferred stock, net of issuance costs	363.6														$ 363.6
Deemed distribution for recognition of beneficial conversion feature on preferred stock	0.0			40.9	(40.9)
Proceeds from common stock offering, net of issuance costs (in shares)		27,953
Proceeds from common stock offering, net of issuance costs	733.8	$ 0.1		733.7
Issuance of common stock for acquisitions (in shares)		4,704	45
Issuance of common stock for acquisitions	138.2		$ 0.1	138.1
Issuance of common stock upon conversion of convertible senior notes, net of tax (in shares)		1,641
Issuance of common stock upon conversion of convertible senior notes, net of tax	27.1			27.1
Dividend paid	(2.9)				(2.9)
Stock compensation expense	7.5			7.5
Balance (in shares) at Dec. 31, 2014		77,422	0								73				0				0
Balance at Dec. 31, 2014	1,655.1	$ 0.1	$ 0.0	1,831.9	(219.1)	$ 0.0	$ 0.0	$ 0.0	$ 0.0		$ 42.2				$ 0.0				$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(191.6)				(191.6)
Other comprehensive income (loss), net of $7.6 total tax effect	(78.6)					(68.5)	6.9	(17.0)
Transfer to noncontrolling interest from redeemable noncontrolling interest	324.6			4.2					320.4
Acquisition of noncontrolling interest and activity during the year	30.1				0.5	6.7	(0.2)	(0.2)	23.3
Exercise of warrants and stock options and other (in shares)		683
Exercise of warrants and stock options and other	2.9			2.9
Conversion of preferred stock to common stock (in shares)											0	64							563	12,501
Conversion of preferred stock to common stock										$ 0.0	$ (0.2)		$ 0.2					$ 0.0	$ (548.5)		$ 548.5
Proceeds from issuance of preferred stock, net of issuance costs (in shares)																			563
Proceeds from issuance of preferred stock, net of issuance costs	548.5																		$ 548.5
Deemed distribution for recognition of beneficial conversion feature on preferred stock	0.0			52.0	(52.0)
Proceeds from common stock offering, net of issuance costs (in shares)		15,499
Proceeds from common stock offering, net of issuance costs	679.6			679.6
Issuance of common stock for acquisitions (in shares)		38
Issuance of common stock for acquisitions	1.5			1.5
Awards assumed in acquisition	17.6			17.6
Issuance of common stock upon conversion of convertible senior notes, net of tax (in shares)		3,316
Issuance of common stock upon conversion of convertible senior notes, net of tax	55.6			55.6
Dividend paid	(2.8)				(2.8)
Stock compensation expense	18.3			18.3
Balance (in shares) at Dec. 31, 2015		109,523									73								0
Balance at Dec. 31, 2015	$ 3,060.8	$ 0.1		$ 3,212.3	$ (465.0)	$ (61.8)	$ 6.7	$ (17.2)	$ 343.7		$ 42.0								$ 0.0