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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Consolidated Statements of Comprehensive Income      
Net income $ 2,736 $ 5,408 $ 5,163
Other comprehensive income (loss)      
Net unrealized securities losses, net of tax (7) (51) (38)
Foreign currency translation adjustments, net of tax 301 (218) (545)
Net unrealized pension and other postretirement benefit, net of tax 62 19 (32)
Other comprehensive gain (loss) 356 (250) (615)
Comprehensive income $ 3,092 $ 5,158 $ 4,548