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Per Share Data (Basic and Diluted EPS Calculation Continuing Operations) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Earnings Per Share [Abstract]        
Net income before non-controlling interests $ 306 $ 279 $ 1,377 $ 1,511
Less: Net income attributable to non-controlling interests 3 3 26 14
Net income attributable to the Company $ 303 $ 276 $ 1,351 $ 1,497
Basic weighted average common shares outstanding (in shares) 506 504 506 506
Dilutive effect of potentially issuable common shares (in shares) 5 6 5 6
Diluted weighted average common shares outstanding (in shares) 511 510 511 512
Average stock price used to calculate common stock equivalents (in dollars per share) $ 99.97 $ 84.68 $ 94.75 $ 83.05