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Other Income (Expense)
 12 Months Ended
Dec. 31, 2014
Other Income (Expense) [Abstract]  
Other Income (Expense) [Text Block]
OTHER INCOME (EXPENSE)

Year Ended December 31
2014

2013

2012

Millions
 
 
 
AFUDC – Equity

$7.8


$4.6


$5.1

Gain on Sale of Available-for-sale Securities
0.2

2.2

—

Investments and Other Income
0.6

2.5

0.9

Total Other Income

$8.6


$9.3


$6.0