Principles Of Consolidation Principles Of Consolidation (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended
	Dec. 02, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Impaired Long-Lived Assets Held and Used [Line Items]
Stockholders' Equity Note, Reverse Stock Split, Conversion Ratio	0.003333
Assets Held-for-sale, Long Lived		$ 10.0		$ 10.0		$ 39.1
Impairment of Long-Lived Assets Held-for-use		0.6	1.1	12.1	8.2
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income			2.4		3.3
Surplus Properties [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use				$ 5.1