Statements of Consolidated Income (Parentheticals) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Accumulated other comprehensive income reclassifications related to VEBA adjustments	$ 1.4		$ 1.8	$ 2.8		$ 3.6
Reclassification of unrealized gain upon sale of available for sale securities	0.2	[1]	0	0.6	[1]	0
Other comprehensive income reclassification adjustment, tax	$ (0.4)		$ (0.7)	$ (0.8)		$ (1.4)

[1] Amounts reclassified out of Accumulated other comprehensive income relating to sales of available for sale securities were included as a component of Other (expense) income, net.