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Redeemable Noncontrolling Interests (Tables)
 12 Months Ended
Dec. 31, 2016
Redeemable Noncontrolling Interests [Abstract]  
Redeemable Noncontrolling Interest [Table Text Block]
Changes in redeemable noncontrolling interests were as follows:
 
Redeemable Noncontrolling Interests
Balance at December 31, 2015
$
—

Purchase of noncontrolling interests
44.1

Balance at December 31, 2016
$
44.1