Per Share Data (Basic and Diluted EPS Calculation Continuing Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income from continuing operations	$ 400	$ 339	$ 812	$ 693
Less: Net income attributable to non-controlling interests	7	8	18	15
Net income attributable to the Company	388	329	801	676
Basic weighted average common shares outstanding (in shares)	551	545	549	544
Diluted weighted average common shares outstanding (in shares)	559	553	558	552
Stock options outstanding	26.5	37.3	26.5	37.3
Continuing Operations [Member]
Net income from continuing operations	400	339	812	693
Less: Net income attributable to non-controlling interests	7	8	18	15
Net income attributable to the Company	$ 393	$ 331	$ 794	$ 678
Basic weighted average common shares outstanding (in shares)	551	545	549	544
Dilutive effect of potentially issuable common shares	8	8	9	8
Diluted weighted average common shares outstanding (in shares)	559	553	558	552
Average stock price used to calculate common stock equivalents	$ 39.15	$ 32.31	$ 37.68	$ 32.13