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Goodwill (Tables)
6 Months Ended
Jun. 30, 2019
Goodwill.  
Schedule of changes in the carrying amount of goodwill

(in millions)

Balance at January 1, 2019

$

1,870.8

Acquisition

1.0

Purchase price allocation adjustments

(0.5)

Foreign currency translation gain

2.5

Balance at June 30, 2019

$

1,873.8