CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Total Stockholders' Equity	Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income	Non- controlling Interests
Balance at Dec. 31, 2019	$ 2,219.3	$ 2,220.9	$ 0.0	$ 2.6	$ 4,114.2	$ (78.9)	$ (1,536.5)	$ (280.5)	$ (1.6)
Balance (in shares) at Dec. 31, 2019			2,000,000	258,428,333		8,277,198
Increase (Decrease) in Stockholders' Equity
Net income	9.8	9.8					9.8
Other comprehensive income, net of taxes	(43.3)	(43.3)						(43.3)
Exercise/ vesting of share based compensation	(1.8)	(1.8)			0.2	$ (2.0)
Exercise/ vesting of share based compensation (in shares)				557,541		170,227
Issuance of common stock under ESPP	0.5	0.5			0.5
Issuance of common stock under ESPP (in shares)				58,566
Preferred stock conversion (in shares)			(2,000,000)	2,000,000
Repurchases of common stock	(33.1)	(33.1)				$ (33.1)
Repurchases of common stock (in shares)						3,742,488
Equity compensation expense	3.8	3.8			3.8
Changes in non-controlling interests	(0.1)								(0.1)
Balance at Jun. 30, 2020	2,155.1	2,156.8	$ 0.0	$ 2.6	4,118.7	$ (114.0)	(1,526.7)	(323.8)	(1.7)
Balance (in shares) at Jun. 30, 2020			0	261,044,440		12,189,913
Balance at Mar. 31, 2020	2,141.4	2,143.0		$ 2.6	4,117.1	$ (113.9)	(1,527.9)	(334.9)	(1.6)
Balance (in shares) at Mar. 31, 2020				260,933,009		12,182,019
Increase (Decrease) in Stockholders' Equity
Net income	1.2	1.2					1.2
Other comprehensive income, net of taxes	11.1	11.1						11.1
Exercise/ vesting of share based compensation	(0.1)	(0.1)				$ (0.1)
Exercise/ vesting of share based compensation (in shares)				81,554		7,894
Issuance of common stock under ESPP	0.2	0.2			0.2
Issuance of common stock under ESPP (in shares)				29,877
Equity compensation expense	1.4	1.4			1.4
Changes in non-controlling interests	(0.1)								(0.1)
Balance at Jun. 30, 2020	2,155.1	2,156.8	$ 0.0	$ 2.6	4,118.7	$ (114.0)	(1,526.7)	(323.8)	(1.7)
Balance (in shares) at Jun. 30, 2020			0	261,044,440		12,189,913
Balance at Dec. 31, 2020	2,318.1	2,319.8		$ 2.6	4,122.9	$ (137.7)	(1,473.2)	(194.8)	(1.7)
Balance (in shares) at Dec. 31, 2020				261,330,127		14,229,280
Increase (Decrease) in Stockholders' Equity
Net income	163.4	163.4					163.4
Other comprehensive income, net of taxes	(8.2)	(8.2)						(8.2)
Exercise/ vesting of share based compensation	0.3	0.3			2.0	$ (1.7)
Exercise/ vesting of share based compensation (in shares)				514,410		95,453
Issuance of common stock under ESPP	0.5	0.5			0.5
Issuance of common stock under ESPP (in shares)				40,644
Repurchases of common stock (in shares)						1,700
Dividends	(27.3)	(27.3)					(27.3)
Equity compensation expense	21.5	21.5			21.5
Balance at Jun. 30, 2021	2,468.3	2,470.0		$ 2.6	4,146.9	$ (139.4)	(1,337.1)	(203.0)	(1.7)
Balance (in shares) at Jun. 30, 2021				261,885,181		14,326,433
Balance at Mar. 31, 2021	2,347.8	2,349.5		$ 2.6	4,129.5	$ (139.2)	(1,403.3)	(240.1)	(1.7)
Balance (in shares) at Mar. 31, 2021				261,768,818		14,315,406
Increase (Decrease) in Stockholders' Equity
Net income	81.1	81.1					81.1
Other comprehensive income, net of taxes	37.1	37.1						37.1
Exercise/ vesting of share based compensation	(0.1)	(0.1)			0.1	$ (0.2)
Exercise/ vesting of share based compensation (in shares)				97,997		11,027
Issuance of common stock under ESPP	0.2	0.2			0.2
Issuance of common stock under ESPP (in shares)				18,366
Dividends	(14.9)	(14.9)					(14.9)
Equity compensation expense	17.1	17.1			17.1
Balance at Jun. 30, 2021	$ 2,468.3	$ 2,470.0		$ 2.6	$ 4,146.9	$ (139.4)	$ (1,337.1)	$ (203.0)	$ (1.7)
Balance (in shares) at Jun. 30, 2021				261,885,181		14,326,433