Per Share Data (Basic EPS Calculation Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income from continuing operations	$ 246	$ 133	$ 939	$ 738
Less: Net income attributable to non-controlling interests	6	5	21	18
Net income attributable to the Company	241	130	917	737
Basic weighted average common shares outstanding (in shares)	544	540	544	543
Continuing Operations [Member]
Net income from continuing operations	246	133	939	738
Less: Net income attributable to non-controlling interests	6	5	21	18
Net income attributable to the Company	240	128	918	720
Less: Portion attributable to participating securities	0	1	2	5
Net income attributable to common shares for basic earnings per share	$ 240	$ 127	$ 916	$ 715
Basic weighted average common shares outstanding (in shares)	544	540	544	543