Receivables (Additional Attributes Of Receivables Sold Under The Agreement) (Details) - IPL [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Receivables [Line Items]
Collections reinvested in receivables	$ 422.2	$ 417.1	$ 862.4	$ 923.0
Credit losses (recoveries), net	$ (0.7)	$ 2.5	$ (0.3)	$ 3.5