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Equity (Tables)
 12 Months Ended
Dec. 31, 2017
Stock-Based Compensation  
Schedule of shares repurchased under our securities repurchase program and shares acquired

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year Ended December 31,

 

 

 

2017

 

2016

 

2015

 

Shares repurchased (1)

    

 

302,000

    

 

4,512,325

    

 

854,313

 

Aggregate purchase price

 

$

12.7

 

$

167.9

 

$

40.9

 

Average purchase price per share

 

$

41.95

 

$

37.21

 

$

47.86

 

 

 

 

 

 

 

 

 

 

 

 

Shares acquired (2)

 

 

133,710

 

 

144,717

 

 

156,383

 

Aggregate purchase price

 

$

5.8

 

$

5.7

 

$

8.0

 

Average purchase price per share

 

$

43.28

 

$

39.47

 

$

51.05

 

                                                 

(1)

Shares were repurchased under our securities repurchase program. As of December 31, 2017, we had $200.0 million in repurchase authorization under the repurchase program.

(2)

Shares were acquired from employees in connection with a net share settlement feature of employee equity awards.