Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings per Share

A reconciliation of shares for basic and diluted income per share is set forth below (in millions):

	Three months ended June 30,		Six months ended June 30,
	2017	2016	2017	2016
Average common shares outstanding	126.3	125.4	126.0	125.2
Effect of dilutive securities - share-based compensation	—	0.9	—	0.7
Average shares for diluted computations	126.3	126.3	126.0	125.9

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 June 30,		Six months ended June 30,
	2017	2016	2017	2016
Share options and appreciation rights	1.9	1.6	1.9	1.6
Nonvested restricted shares, P-Units and RSUs	4.9	0.7	4.6	1.9
Total potentially dilutive shares	6.8	2.3	6.5	3.5