|
Common Stock and Stock Plans Textuals (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Warrants outstanding to purchase common shares, number of shares | 39,109,299 | ||
| Warrants Purchased | 70,210 | 264,972 | |
| Total number of shares of common stock available for grant under plans | 173,000,000 | ||
| Warrants outstanding to purchase common stock, exercise price | $ 34.01 | ||
|
Restricted Share Rights [Member]
|
|||
| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Granted, weighted-average grant-date fair value | $ 31.49 | $ 31.02 | $ 27.29 |
| Unrecognized compensation cost related to nonvested awards | $ 671 | ||
| Expected weighted-average period to recognize compensation costs related to awards | 2 years 10 months 24 days | ||
| Fair value of awards vested | 89 | 41 | 15 |
| Vested, shares | (2,620,424) | ||
| Terms of award | Holders of RSRs are entitled to the related shares of common stock at no cost generally over three to five years after the RSRs were granted. | ||
|
Performance Shares [Member]
|
|||
| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Granted, weighted-average grant-date fair value | $ 31.44 | $ 31.26 | $ 27.46 |
| Unrecognized compensation cost related to nonvested awards | 89 | ||
| Expected weighted-average period to recognize compensation costs related to awards | 1 year 9 months 18 days | ||
| Vested, shares | 0 | ||
| Terms of award | Holders of performance share awards are entitled to the related shares of common stock at no cost subject to the Company's achievement of specified performance criteria over a three-year period. | ||
| Future vesting amount, minimum | 0 | ||
| Future vesting amount, maximum | either 125% or 150% of target. | ||
|
Stock Options [Member]
|
|||
| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Unrecognized compensation cost related to nonvested awards | 0 | ||
| Total intrinsic value of options exercised | 694 | 246 | 298 |
| Cash received from exercise of options | $ 1,500 | $ 554 | $ 687 |
| Award vesting rights | Except for options granted in 2004 and 2005, which generally vested in full upon grant, options generally become exercisable over three years beginning on the first anniversary of the date of grant. | ||
| Terms of award | Stock options must have an exercise price at or above fair market value (as defined in the plan) of the stock at the date of grant (except for substitute or replacement options granted in connection with mergers or other acquisitions) and a term of no more than 10 years. | ||
|
Director Awards [Member]
|
|||
| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Award vesting rights | The stock award vests immediately. | ||
| Terms of award | Options granted to directors can be exercised after twelve months through the tenth anniversary of the grant date. | ||
| Options granted, shares | 82,893 | ||
|
PartnerShares Plan [Member]
|
|||
| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Options granted, shares | 0 | ||
| Future options to be granted, shares | 0 | ||