Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.

	Three months ended September 30,				Nine months ended September 30,
	2016		2015		2016		2015
Net income available to IPG common stockholders	$	128.6	$	74.9	$	290.9	$	194.3
Weighted-average number of common shares outstanding - basic	397.7		407.6		399.5		409.7
Add: Effect of dilutive securities
Restricted stock, stock options and other equity awards	10.2		7.9		9.3		7.3
Weighted-average number of common shares outstanding - diluted	407.9		415.5		408.8		417.0
Earnings per share available to IPG common stockholders:
Basic	$	0.32	$	0.18	$	0.73	$	0.47
Diluted	$	0.32	$	0.18	$	0.71	$	0.47