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Other Income (Expense) (Tables)
12 Months Ended
Dec. 31, 2011
Other Income and Expenses [Abstract]  
Other Income (Expense) [Table Text Block]
Year Ended December 31
2011
2010
2009
Millions
 
 
 
AFUDC - Equity

$2.5


$4.2


$5.8

Investment and Other Income (Expense)
1.9

0.4

(4.0
)
Total Other Income

$4.4


$4.6


$1.8