Per Share Data (Basic and Diluted EPS Calculation Continuing Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Net income from continuing operations	$ 260	$ 246	$ 1,072	$ 939
Less: Net income attributable to non-controlling interests	6	6	24	21
Net income attributable to the Company	$ 254	$ 240	$ 1,048	$ 918
Basic weighted average common shares outstanding (in shares)	549	544	549	544
Dilutive effect of potentially issuable common shares (in shares)	9	8	9	8
Diluted weighted average common shares outstanding (in shares)	558	552	558	552
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 42.08	$ 33.53	$ 39.15	$ 32.60
Stock options outstanding (in shares)	24.9	35.1	24.9	35.1