CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Millions	Total	Preferred stock [Member]	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings (deficit) [Member]	Accumulated other comprehensive income (loss) [Member]	Treasury stock [Member]	Non-controlling interest [Member]
Balance at Dec. 31, 2009	$ 498.4	$ 667.3	$ 3.6	$ (2.4)	$ (197.7)	$ (3.2)	$ (38.9)	$ 69.7
Net income	63.8				50.3			13.5
Cash dividends	(53.3)			(11.7)	(33.8)			(7.8)
Other comprehensive income (loss), net	9.0					4.6		4.4
Treasury stock acquired	(2.0)						(2.0)
Equity transactions with noncontrolling interest, net	304.6			87.8		19.8		197.0
Other	(2.3)			0.1	(2.0)			(0.4)
Balance at Dec. 31, 2010	818.2	667.3	3.6	73.8	(183.2)	21.2	(40.9)	276.4
Net income	295.0				217.5			77.5
Cash dividends	(83.0)				(53.7)			(29.3)
Other comprehensive income (loss), net	(33.6)					(44.5)		10.9
Treasury stock acquired	(8.7)						(8.7)
Equity transactions with noncontrolling interest, net	0.7			0.4				0.3
Other	4.4			4.4
Balance at Dec. 31, 2011	993.0	667.3	3.6	78.6	(19.4)	(23.3)	(49.6)	335.8
Net income	222.1				159.8			62.3
Cash dividends	(83.6)				(65.0)			(18.6)
Other comprehensive income (loss), net	(40.2)					(18.7)		(21.5)
Equity transactions with noncontrolling interest, net	0.3			0.2				0.1
Other	0.1			0.1
Balance at Dec. 31, 2012	$ 1,091.7	$ 667.3	$ 3.6	$ 78.9	$ 75.4	$ (42.0)	$ (49.6)	$ 358.1