XML 57 R33.htm IDEA: XBRL DOCUMENT v3.10.0.1
Earnings Per Share - Computation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Earnings Per Share [Abstract]        
Earnings available to common stockholders $ 684 $ 821 $ 831 $ 920
Basic weighted-average shares outstanding (in shares) 274.7 306.9 279.3 310.3
Effect of employee stock awards (in shares) 0.9 0.8 0.9 0.8
Diluted weighted-average shares outstanding (in shares) 275.6 307.7 280.2 311.1
Earnings per share, basic (in dollars per share) $ 2.49 $ 2.67 [1] $ 2.97 $ 2.96 [1]
Earnings per share, diluted (in dollars per share) $ 2.48 $ 2.67 [1] $ 2.96 $ 2.96 [1]
[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) and Accounting Standards Update No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. See Note 1 to the financial statements contained in Part I, Item 1 of this report for additional information.