Shares Used in Computing Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Computation of shares used in calculating basic and diluted net income per common share

The computation of shares used in calculating basic and diluted net income per common share is as follows:

	Three Months Ended September 30,		Nine Months Ended September 30,
(In millions)	2017	2016	2017	2016
Weighted-average common shares outstanding used for the calculation of net income per share – basic	210.1	219.2	212.1	221.6
Common stock equivalents	4.4	3.5	4.6	3.6
Weighted-average common shares outstanding used for the calculation of net income per share – diluted	214.5	222.7	216.7	225.2