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Consolidated Condensed Statements of Equity (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]        
Cash dividends declared per share (in dollars per share) $ 1.29 $ 1.13 $ 1.29 $ 1.13
Remaining authorized repurchase amount $ 2,400   $ 2,400  
Stock repurchase program, authorized amount   $ 8,000   $ 8,000