CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Preferred stock	Common stock	Additional paid-in capital	Retained earnings (deficit)	Accumulated other comprehensive loss	Treasury stock	Non-controlling interest
Balance at Dec. 31, 2017	$ 766.7	$ 667.3	$ 3.6		$ (17.9)	$ (179.0)	$ (49.6)	$ 342.3
Change in accounting principle – ASU 2014-09 at Dec. 31, 2017	5.0				2.7			2.3
Balance at January 1, 2018, as adjusted at Dec. 31, 2017	771.7	667.3	3.6		(15.2)	(179.0)	(49.6)	344.6
Net income	107.8				89.3			18.5
Other comprehensive income (loss), net	12.0					8.8		3.2
Dividends paid to noncontrolling interest	(3.9)							(3.9)
Cash dividends	(6.8)				(6.8)
Balance at Mar. 31, 2018	880.8	667.3	3.6		67.3	(170.2)	(49.6)	362.4
Balance at Dec. 31, 2017	766.7	667.3	3.6		(17.9)	(179.0)	(49.6)	342.3
Change in accounting principle – ASU 2014-09 at Dec. 31, 2017	5.0				2.7			2.3
Balance at January 1, 2018, as adjusted at Dec. 31, 2017	771.7	667.3	3.6		(15.2)	(179.0)	(49.6)	344.6
Net income	128.2
Other comprehensive income (loss), net	(8.6)
Balance at Jun. 30, 2018	870.4	667.3	3.6		72.6	(185.2)	(49.6)	361.7
Balance at Mar. 31, 2018	880.8	667.3	3.6		67.3	(170.2)	(49.6)	362.4
Net income	20.4				11.7			8.7
Other comprehensive income (loss), net	(20.6)					(15.0)		(5.6)
Dividends paid to noncontrolling interest	(4.0)							(4.0)
Cash dividends	(6.8)			$ (0.4)	(6.4)
Other, net	0.6			0.4				0.2
Balance at Jun. 30, 2018	870.4	667.3	3.6		72.6	(185.2)	(49.6)	361.7
Balance at Dec. 31, 2018	989.0	667.3	3.6		220.3	(206.2)	(49.6)	353.6
Net income	28.4				18.2			10.2
Other comprehensive income (loss), net	1.8					1.3		0.5
Dividends paid to noncontrolling interest	(6.3)							(6.3)
Cash dividends	(6.8)				(6.8)
Balance at Mar. 31, 2019	1,006.1	667.3	3.6		231.7	(204.9)	(49.6)	358.0
Balance at Dec. 31, 2018	989.0	667.3	3.6		220.3	(206.2)	(49.6)	353.6
Net income	46.6
Other comprehensive income (loss), net	10.4
Balance at Jun. 30, 2019	1,017.0	667.3	3.6		230.2	(198.5)	(49.6)	364.0
Balance at Mar. 31, 2019	1,006.1	667.3	3.6		231.7	(204.9)	(49.6)	358.0
Net income	18.2				7.1			11.1
Other comprehensive income (loss), net	8.6					6.4		2.2
Dividends paid to noncontrolling interest	(8.3)							(8.3)
Cash dividends	(6.8)			(0.3)	(6.5)
Equity transactions with noncontrolling interest, net and other	(0.8)			$ 0.3	(2.1)			1.0
Balance at Jun. 30, 2019	$ 1,017.0	$ 667.3	$ 3.6		$ 230.2	$ (198.5)	$ (49.6)	$ 364.0