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Other Income (Expense) (Tables)
12 Months Ended
Dec. 31, 2012
Other Income (Expense) [Abstract]  
Other Income (Expense) [Table Text Block]
Year Ended December 31
2012
2011
2010
Millions
 
 
 
AFUDC – Equity

$5.1


$2.5


$4.2

Investment and Other Income
0.9

1.9

0.4

Total Other Income

$6.0


$4.4


$4.6