Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings per Share

The following table sets forth a reconciliation of basic and diluted shares (in millions):

	Three months ended September 30,		Nine months ended September 30,
	2016	2015	2016	2015
Average common shares outstanding	125.4	124.8	125.3	124.5
Effect of dilutive securities - share-based compensation	1.3	—	1.1	—
Average shares for diluted computations	126.7	124.8	126.4	124.5

Antidilutive Securities Excluded From Earnings per Share

Anti-dilutive shares, which could potentially dilute earnings per share in the future, are set forth below (in millions):

	Three months ended September 30,		Nine months ended September 30,
	2016	2015	2016	2015
Share options and appreciation rights	1.6	1.3	1.7	1.4
Restricted share units	0.7	1.2	1.3	1.7
Total potentially dilutive shares	2.3	2.5	3.0	3.1