Per Share Data (Basic and Diluted EPS Calculation Continuing Operations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income before non-controlling interests	$ 727	$ 696
Less: Net income attributable to non-controlling interests	11	6
Net income attributable to the Company	$ 716	$ 690
Basic weighted average common shares outstanding (in shares)	505	508
Dilutive effect of potentially issuable common shares (in shares)	6	6
Diluted weighted average common shares outstanding (in shares)	511	514
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 88.54	$ 82.83