Equity Equity (Other Comprehensive Income in Noncontrolling Interest) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Noncontrolling Interest [Line Items]
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax	$ (2.2)	$ 3.3	$ (12.4)
Pension and OPEB Adjustments [Member]
Noncontrolling Interest [Line Items]
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax	0	0	(1.3)
Foreign Currency Gain (Loss) [Member]
Noncontrolling Interest [Line Items]
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax	$ (2.2)	$ 3.3	$ (11.1)