Per Share Data (Diluted EPS Calculation Net Income) (Details) (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net income attributable to the Company	$ 282	$ 236	$ 607	$ 484
Basic weighted average common shares outstanding	547	541	545	537
Diluted weighted average common shares outstanding	555	545	554	541
Stock options outstanding	41.4	45.6	41.4	45.6
Net Income [Member]
Net income attributable to the Company	282	236	607	484
Less: Portion attributable to participating securities	2	3	4	8
Net income attributable to common shares for diluted earnings per share	$ 280	$ 233	$ 603	$ 476
Basic weighted average common shares outstanding	547	541	545	537
Dilutive effect of potentially issuable common shares	8	4	9	4
Diluted weighted average common shares outstanding	555	545	554	541
Average stock price used to calculate common stock equivalents	$ 30.03	$ 23.16	$ 29.47	$ 23.00