Equity

12 Months Ended

Dec. 31, 2016

Equity

Equity

14. Equity

A summary of shares repurchased under our securities repurchase program, and shares acquired, is as follows:

	Year Ended December 31,
	2016		2015		2014
Shares repurchased (1)		4,512,325		854,313		175,000
Aggregate purchase price	$	167.9	$	40.9	$	8.0
Average purchase price per share	$	37.21	$	47.86	$	45.95
Shares acquired (2)		144,717		156,383		160,350
Aggregate purchase price	$	5.7	$	8.0	$	7.5
Average purchase price per share	$	39.47	$	51.05	$	46.48

(1) Shares were repurchased under our securities repurchase program. As of December 31, 2016, we have $32.1 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.