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Interest Expense
6 Months Ended
Jun. 30, 2015
Interest Expense [Abstract]  
Interest Expense
Interest Expense
Details of interest expense are as follows:
 
Three months ended 
 June 30,
 
Six months ended 
 June 30,
 
2015
 
2014
 
2015
 
2014
 
(in millions)
Interest on borrowings(1)
$
63.5

 
$
63.5

 
$
127.0

 
$
111.4

Fees on financing agreements(1)
2.4

 
2.4

 
3.8

 
5.9

Interest on tax liabilities
0.5

 
0.4

 
1.0

 
1.9

Interest capitalized
(37.4
)
 
(15.6
)
 
(68.9
)
 
(28.5
)
 
$
29.0

 
$
50.7

 
$
62.9

 
$
90.7


_______________________________________________________________________________

(1) 
See Note 12—Financing Agreements for additional information.