Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

The following discloses basic and diluted weighted average shares outstanding:

	Year Ended December 31,
(Shares in millions)	2017	2016	2015
Basic and Diluted Weighted Average Shares Outstanding	990	887	779

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table discloses the number of anti-dilutive shares excluded:

	Year Ended December 31,
(Shares in millions)	2017	2016	2015
Anti-dilutive Potential Shares	250	104	3