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Common Stock and Stock Plans Textuals (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Warrants outstanding to purchase common shares, number of shares | 39,179,509 | ||
| Warrants outstanding to purchase common stock, exercise price | $ 34.01 | ||
| Warrants purchased | 264,972 | ||
| Common stock issued to pay annual bonus awards, fair value | $ 0 | $ 0 | $ 94 |
| Shares issued for compensation of executive officers, number | 0 | 62,630 | 244,689 |
| Shares issued for compensation of executive officers, average fair value | $ 27.44 | $ 27.77 | |
| Total number of shares of common stock available for grant under plans | 157 | ||
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Restricted Share Rights [Member]
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| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Granted, weighted-average grant-date fair value | $ 31.02 | $ 27.29 | $ 19.04 |
| Unrecognized compensation cost related to nonvested awards | 561 | ||
| Expected weighted-average period to recognize unrecognized compensation costs related to awards | 3.6 | ||
| Fair value of awards vested | 41 | 15 | 2 |
| Vested, shares | (1,426,158) | ||
| Award vesting rights | 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. | ||
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Performance Share Awards [Member]
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| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Granted, weighted-average grant-date fair value | $ 31.26 | $ 27.46 | $ 27.09 |
| Unrecognized compensation cost related to nonvested awards | 45 | ||
| Expected weighted-average period to recognize unrecognized compensation costs related to awards | 2.0 | ||
| Vested, shares | 0 | ||
| Award vesting rights | 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 | ||
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Stock Options [Member]
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| Common Stock and Stock Plans (Textual) [Abstract] | |||
| Unrecognized compensation cost related to nonvested awards | 8 | ||
| Expected weighted-average period to recognize unrecognized compensation costs related to awards | 0.3 | ||
| Total intrinsic value of options exercised | 246 | 298 | 50 |
| Cash received from exercise of options | $ 554 | $ 687 | $ 153 |
| 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. | ||
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Director Awards [Member]
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| 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. | ||