|
Redeemable Noncontrolling Interests and Total Equity (Changes in Shares of Common Stock Outstanding) (Details)
|
1 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2009
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
||||||
| Total Equity | |||||||||
| Shares outstanding at beginning of period | 1,927,000,000 | 1,512,000,000 | 1,361,000,000 | ||||||
| Public offerings and other issuances of common stock | 85,890,277 | 0 | 385,000,000 | 116,000,000 | |||||
| Net impact of stock option exercises and other share issuances | 60,000,000 | 41,000,000 | 46,000,000 | ||||||
| Treasury stock purchases | (13,000,000) | [1] | (11,000,000) | [1] | (11,000,000) | [1] | |||
| Shares outstanding at end of period | 1,974,000,000 | 1,927,000,000 | 1,512,000,000 | ||||||
|
|||||||||