Other Income (Expense) (Tables)

6 Months Ended

Jun. 30, 2011

Other Income (Expense) [Abstract]

Other Income (Expense)

	Quarter Ended		Six Months Ended
	June 30,		June 30,
	2011	2010	2011	2010
Millions
AFUDC - Equity	$0.5	$0.9	$1.1	$2.1
Investment and Other Income	0.5	1.3	0.7	1.1
Total Other Income	$1.0	$2.2	$1.8	$3.2