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Quarterly Financial Information (Unaudited)
12 Months Ended
Dec. 31, 2019
Quarterly Financial Information [Abstract]  
Quarterly Financial Information (Unaudited)
Supplementary Data

Quarterly Financial Information (Unaudited)
(in millions, except share and per share amounts)First QuarterSecond QuarterThird QuarterFourth QuarterFull Year
2019
Total revenues$11,080  $10,979  $11,061  $11,878  $44,998  
Operating income1,476  1,541  1,471  1,234  5,722  
Net income908  939  870  751  3,468  
Net income attributable to common stockholders908  939  870  751  3,468  
Earnings per share
Basic$1.07  $1.10  $1.02  $0.88  $4.06  
Diluted$1.06  $1.09  $1.01  $0.87  $4.02  
Weighted average shares outstanding
Basic851,223,498  854,368,443  854,578,241  856,294,467  854,143,751  
Diluted858,643,481  860,135,593  862,690,751  864,158,739  863,433,511  
2018
Total revenues $10,455  $10,571  $10,839  $11,445  $43,310  
Operating income 1,282  1,450  1,440  1,137  5,309  
Net income671  782  795  640  2,888  
Net income attributable to common stockholders671  782  795  640  2,888  
Earnings per share
Basic$0.78  $0.92  $0.94  $0.75  $3.40  
Diluted$0.78  $0.92  $0.93  $0.75  $3.36  
Weighted average shares outstanding
Basic855,222,664  847,660,488  847,087,120  849,102,785  849,744,152  
Diluted862,244,084  852,040,670  853,852,764  856,344,347  858,290,174  

Earnings per share is computed independently for each quarter and the sum of the quarters may not equal earnings per share for the full year.