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, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income from continuing operations	$ 578	$ 490
Less: Net income attributable to non-controlling interests	9	9
Net income attributable to the Company	$ 569	$ 481
Basic weighted average common shares outstanding (in shares)	515.0	521.0
Dilutive effect of potentially issuable common shares (in shares)	7.0	5.0
Diluted weighted average common shares outstanding (in shares)	522.0	526.0
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 71.32	$ 55.86
Stock options outstanding (in shares)	12.8	14.6