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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
The following table presents the Company’s fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis as of September 30, 2017:
In Millions
Fair Value
 
Fair value measurements
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Derivative instruments
$
11.7

 
$
—

 
$
11.7

 
$
—

Liabilities:
 
 
 
 
 
 
 
Derivative instruments
$
5.3

 
$
—

 
$
5.3

 
$
—

The following table presents the Company’s fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis as of December 31, 2016:
In Millions
Fair Value
 
Fair value measurements
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Derivative instruments
$
0.6

 
$
—

 
$
0.6

 
$
—

Liabilities:
 
 
 
 
 
 
 
Derivative instruments
$
20.8

 
$
—

 
$
20.8

 
$
—