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Redeemable Noncontrolling Interest (Tables)
 12 Months Ended
Dec. 31, 2014
Noncontrolling Interest [Abstract]  
Schedule of Redeemable Noncontrolling Interest
The following is a rollforward of the redeemable noncontrolling interest (in millions):
Balance, December 31, 2012
$
18.6

Foreign currency translation
(1.6
)
Balance, December 31, 2013
$
17.0

Foreign currency translation
(3.2
)
Balance, December 31, 2014
$
13.8