Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Computations of Weighted Average Shares Outstanding

The computations of the weighted average shares outstanding for the periods indicated are as follows (in millions):

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Weighted-average shares outstanding		485.8		483.3		485.6		483.0
Share-based payment awards classified as participating securities (1)		0.4		1.0		0.5		1.2
Basic weighted-average shares outstanding		486.2		484.3		486.1		484.2
Dilutive securities (2)		—		1.6		—		1.6
Diluted weighted-average shares outstanding		486.2		485.9		486.1		485.8

(1) For the three months ended June 30, 2018 and 2017 dividends and equivalents for share-based awards that are expected to be forfeited do not have a material effect on net income for basic and diluted earnings per share.

(2) The three and six months ended June 30, 2018 excludes 0.8 million and 0.9 million potentially dilutive share-based awards as their effect would be anti-dilutive.