Commitments And Contingencies (Pace) (Narrative) (Details) (Pace, Florida [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2006 Y	Mar. 31, 2012
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 42.0	$ 34.6
Years to complete environmental remediation	20
Environmental loss contingencies estimated costs through completion, minimum	42.0
Environmental loss contingencies estimated costs through completion, maximum	52.0
Discontinued Operations [Member]
Loss Contingencies [Line Items]
Pretax expense recognized as a component of income from discontinued operations	$ 42.0