Discontinued Operations and Assets and Liabilities Held For Sale (Components Of Discontinued Operations In Consolidated Statements Of Income) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations and Disposal Groups [Abstract]
Net proceeds			$ 17
Operating revenues	0.9	289.2	445.0
Operating expenses	9.9	297.0	476.9
Interest expense and other	0	0.7	0
Loss before income taxes	(9.0)	(8.5)	(31.9)
Income tax benefit	(3.1)	(3.4)	(12.4)
Loss from discontinued operations, net of tax	$ (5.9)	$ (5.1)	$ (19.5)