Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per share

The following table sets forth the components of basic and diluted earnings per share and shows the effect of these stock options, performance share awards and restricted stock awards on the weighted average number of shares outstanding used in calculating diluted earnings per share: 

	Year Ended December 31,
	2018		2017		2016
Net income attributable to common shareholders	$	2,010	$	3,786	$	1,121
Weighted average common shares outstanding — basic	967		947		924
Assumed exercise and/or distributions of stock-based awards	2		2		3
Weighted average common shares outstanding — diluted	969		949		927