Per Share Data (Basic EPS Calculation Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income from continuing operations	$ 339	$ 286	$ 693	$ 605
Less: Net income attributable to non-controlling interests	8	7	15	13
Net income attributable to the Company	329	282	676	607
Basic weighted average common shares outstanding (in shares)	545	547	544	545
Continuing Operations [Member]
Net income from continuing operations	339	286	693	605
Less: Net income attributable to non-controlling interests	8	7	15	13
Net income attributable to the Company	331	279	678	592
Less: Portion attributable to participating securities	0	1	1	4
Net income attributable to common shares for basic earnings per share	$ 331	$ 278	$ 677	$ 588
Basic weighted average common shares outstanding (in shares)	545	547	544	545