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Earnings Per Share: Schedule of Earnings per Share, Basic and Diluted (Tables)
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
A reconciliation of net income and number of shares used in computing basic and diluted earnings per share was as follows for the three month periods ended March 31:
 
 
 
 
Three Months Ended
(Millions, except per share amounts)
 
 
 
 
 
2015

 
2014

Basic and diluted earnings per share:
 
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
 
Income from continuing operations
 
 
 
 
 
$
5.3

 
$
16.0

Income from continuing operations allocable to participating
   securities
 
(0.7
)
 
(1.3
)
Net income attributable to common shares
 
 
 
 
 
$
4.6

 
$
14.7

 
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
 
Basic shares outstanding
 
 
 
 
 
 
 
 
  Weighted average basic shares outstanding
 
 
 
 
 
100.8

 
99.6

  Weighted average participating securities
 
 
 
 
 
(0.9
)
 
(0.6
)
Weighted average shares outstanding for basic earnings
   per share
 
99.9

 
99.0

Diluted shares outstanding
 
 
 
 
 
 
 
 
Weighted average shares outstanding for basic earnings per share
 
99.9

 
99.0

  Effect of dilutive stock options
 
 
 
 
 
0.1

 
0.1

Weighted average shares outstanding for diluted earnings
   per share
 
100.0

 
99.1

Basic and diluted earnings per share:
 
 
 
 
 
 
 
 
Net income
 
 
 
 
 

$.05

 

$.15