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Noncontrolling Interest
3 Months Ended
Mar. 31, 2018
Noncontrolling Interest [Abstract]  
Noncontrolling Interest Disclosure [Text Block]
12.
NONCONTROLLING INTEREST
We reflect changes in amounts attributable to noncontrolling interests in the Condensed Consolidated Statement of Changes in Equity. We present changes in amounts attributable to redeemable noncontrolling interests in the following table.
(in millions)
 
Redeemable noncontrolling interests as of December 31, 2017
$
3.8

Acquisition of redeemable noncontrolling interest (1)
(3.8
)
Redeemable noncontrolling interests as of March 31, 2018
$

(1) Reflects our redemption of the final portion of the redeemable noncontrolling interest related to our 2014 acquisition of Tenzing AB and includes $2.3 million representing the difference between the redemption value and the carrying value of the acquired interest.