Per Share Data (Diluted EPS Calculation Continuing Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income from continuing operations	$ 412	$ 354
Less: Net income attributable to non-controlling interests	11	7
Net income attributable to the Company	413	347
Basic weighted average common shares outstanding (in shares)	548	542
Diluted weighted average common shares outstanding (in shares)	557	551
Stock options outstanding	28.9	38.2
Continuing Operations [Member]
Net income from continuing operations	412	354
Less: Net income attributable to non-controlling interests	11	7
Net income attributable to the Company	$ 401	$ 347
Basic weighted average common shares outstanding (in shares)	548	542
Dilutive effect of potentially issuable common shares	9	9
Diluted weighted average common shares outstanding (in shares)	557	551
Average stock price used to calculate common stock equivalents	$ 36.21	$ 31.95