Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

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,
	2018	2017	2018	2017
Share options and appreciation rights	1.5	1.9	1.5	1.9
Nonvested restricted shares and restricted share units	4.0	4.9	3.9	4.6
Total potentially dilutive shares	5.5	6.8	5.4	6.5