Condensed Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Accumulated Other Compre- hensive Income (Loss)	(Distribution in Excess of Accumulated Earnings) Earnings Surplus	Non-Controlling Interest	Redeem- able Non- Controlling Interest
Beginning balance (in shares) at Dec. 31, 2018		72.0
Beginning balance at Dec. 31, 2018	$ 1,208.3	$ 1,793.4	$ (51.9)	$ (538.9)	$ 5.7
Total Equity
Net income (loss)	8.7			9.0	(0.3)
Other comprehensive income (loss), net of tax	(0.7)		(0.7)
Dividend on common stock	(10.5)			(10.5)
Share-based compensation	1.4	$ 1.4
Shares issued or repurchased, net (in shares)		0.1
Shares issued or repurchased, net	(1.7)	$ (0.8)		(0.9)
Ending balance (in shares) at Mar. 31, 2019		72.1
Ending balance at Mar. 31, 2019	1,205.5	$ 1,794.0	(52.6)	(541.3)	5.4
Redeemable Non-Controlling Interest, beginning balance at Dec. 31, 2018						$ 7.9
Redeemable Non-Controlling Interest
Net income (loss)						0.0
Redeemable Non-Controlling Interest, ending balance at Mar. 31, 2019						7.9
Beginning balance (in shares) at Dec. 31, 2019		72.3
Beginning balance at Dec. 31, 2019	1,128.7	$ 1,800.1	(48.8)	(626.2)	3.6
Total Equity
Net income (loss)	5.7			6.2	(0.5)
Other comprehensive income (loss), net of tax	(6.3)		(6.3)
Dividend on common stock	(13.8)			(13.8)
Share-based compensation	1.5	$ 1.5
Shares issued or repurchased, net (in shares)		0.0
Shares issued or repurchased, net	(0.9)			(0.9)
Ending balance (in shares) at Mar. 31, 2020		72.3
Ending balance at Mar. 31, 2020	1,110.8	$ 1,801.6	$ (55.1)	$ (638.7)	$ 3.0
Redeemable Non-Controlling Interest, beginning balance at Dec. 31, 2019	6.3					6.3
Redeemable Non-Controlling Interest
Net income (loss)						(0.1)
Redeemable Non-Controlling Interest, ending balance at Mar. 31, 2020	$ 6.2					$ 6.2