Per Share Data (Basic and Diluted EPS Calculation Continuing Operations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income from continuing operations	$ 429	$ 440	$ 927	$ 897
Less: Net income attributable to non-controlling interests	10	7	23	20
Net income attributable to the Company	$ 419	$ 433	$ 904	$ 877
Basic weighted average common shares outstanding (in shares)	535.0	549.0	537.0	548.0
Dilutive effect of potentially issuable common shares (in shares)	6.0	7.0	6.0	8.0
Diluted weighted average common shares outstanding (in shares)	541.0	556.0	543.0	556.0
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 57.75	$ 49.67	$ 57.06	$ 48.75
Stock options outstanding (in shares)	16.2	20.6	16.2	20.6