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Earnings per Share
 12 Months Ended
Dec. 31, 2018
Earnings Per Share Reconciliation [Abstract]  
Earnings Per Share
EARNINGS PER SHARE
Basic earnings per share was computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. The computation of diluted earnings per share reflected the effect of potentially dilutive securities.
The following is a reconciliation of the income and share data used in the basic and diluted earnings per share computations:
(for the year ended December 31, in millions, except per share amounts)
 
2018
 
2017
 
2016
Basic and Diluted
 
 
 
 
 
 
Net income, as reported
 
$
2,523

 
$
2,056

 
$
3,014

Participating share-based awards — allocated income
 
(19
)
 
(15
)
 
(22
)
Net income available to common shareholders — basic and diluted
 
$
2,504

 
$
2,041

 
$
2,992

Common Shares
 
 
 
 
 
 
Basic
 
 
 
 
 
 
Weighted average shares outstanding
 
267.4

 
276.0

 
288.1

Diluted
 
 
 
 
 
 
Weighted average shares outstanding
 
267.4

 
276.0

 
288.1

Weighted average effects of dilutive securities:
 
 
 
 
 
 
Stock options and performance shares
 
2.4

 
2.6

 
2.9

Total
 
269.8

 
278.6

 
291.0

Net income Per Common Share
 
 
 
 
 
 
Basic
 
$
9.37

 
$
7.39

 
$
10.39

Diluted
 
$
9.28

 
$
7.33

 
$
10.28