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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income before non-controlling interests	$ 397	$ 384	$ 1,482	$ 1,354
Less: Net income attributable to non-controlling interests	4	5	19	22
Net income attributable to the Company	$ 393	$ 379	$ 1,463	$ 1,332
Basic weighted average common shares outstanding (in shares)	512.0	518.0	514.0	520.0
Dilutive effect of potentially issuable common shares (in shares)	7.0	5.0	6.0	5.0
Diluted weighted average common shares outstanding (in shares)	519.0	523.0	520.0	525.0
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 79.35	$ 66.98	$ 75.36	$ 62.33
Stock options outstanding (in shares)	11.3	13.6	11.3	13.6