Per Share Data (Basic EPS Calculation Net Income) (Details) (USD $) In Millions	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
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 basic earnings per share	$ 280	$ 233	$ 603	$ 476
Basic weighted average common shares outstanding	547	541	545	537

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6519514

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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details