Condition for Options to become exercisable.

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- Definition

Number of Award Types Under Deferred Stock Unit Plan.

+ References

No definition available.

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- Definition

Number of shares sold.

+ References

No definition available.

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- Definition

Performance shares payable criteria.

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No definition available.

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award Options Maximum Term in Years.

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No definition available.

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- Definition

Share based compensation arrangement by share base payment awards certain options exercisable period commencing from date of grant.

+ References

No definition available.

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- Definition

Shares available for sale to eligible employees.

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- Definition

Weighted average per share fair value of discount.

+ References

No definition available.

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- Definition

Description of the deferred compensation arrangement, including fixed amounts and determinable awards, or the method for determining payments and awards, the timing of such payments and awards, and any requisite service or performance criteria, as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The discount rate from market value on purchase date that participants pay for shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

+ References

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- Definition

Description of the method used for calculating compensation cost for the award under the plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 42

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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- Definition

Net number of share options (or share units) granted during the period.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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Stock Compensation Plans (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Compensation Plans (Textual) [Abstract]
Total compensation cost related to non-vested awards not yet recognized	$ 78	$ 78
Weighted average period of compensation cost recognized (in years)	1 year 292 days
Period commencing from date of grant		3 years
Condition for Options to become exercisable		over a three year period commencing one year from the date of grant, while certain other options become exercisable at the later of three years from the date of grant or upon specified market appreciation of the Company’s common shares.
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures		1,582,000		0
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value		$ 7.41	$ 10.76
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value		4	2	1
Restricted shares or units granted		4,667,000
Restricted shares or units outstanding	6,991,000	6,991,000	4,164,000
ISOP 2005 [Member]
Stock Compensation Plans (Textual) [Abstract]
Shares available for future issuance	10,893,344	10,893,344
ISOP 2010 [Member]
Stock Compensation Plans (Textual) [Abstract]
Maximum limit of shares awarded	18,000,000	18,000,000
Option's maximum terms in years		10 years
Maximum Limit of Shares Awarded to any individual employee under 2010 Stock Option Plan		2,000,000
Deferred Stock Unit Awards [Member]
Stock Compensation Plans (Textual) [Abstract]
Restricted shares or units granted		0	0
Deferred Stock Unit Plan [Member]
Stock Compensation Plans (Textual) [Abstract]
Number of Award Types Under Deferred Stock Unit Plan		2
Deferred Units credited		on or after January 1, 2010 (and any credited to senior executive officers hired on or after October 1, 2009) are paid in three equal installments after the first, second and third anniversaries of their grant date
Restricted stock vesting period		3 years
Restricted Stock Unit Awards [Member]
Stock Compensation Plans (Textual) [Abstract]
Graded vesting attribution method		views one three-year grant with annual graded vesting as three separate sub-grants, each representing one third of the total number of awards granted. The first sub-grant vests over one year, the second sub-grant vests over two years and the third sub-grant vests over three years.
Restricted shares or units granted		0
Restricted shares or units outstanding	832	832	5,319
Performance Based Share Awards [Member]
Stock Compensation Plans (Textual) [Abstract]
Fair value of shares vested based on estimated performance factors		$ 20	$ 20	$ 13
Performance shares payable criteria		within a range of 0% to 200% of the number of shares initially granted based upon the attainment of specific performance goals achieved over a specified period, generally three years
Restricted stock units, restricted stock and performance shares [Member] \| ISOP 2010 [Member]
Stock Compensation Plans (Textual) [Abstract]
Maximum Limit of Shares Awarded to any individual employee under 2010 Stock Option Plan		500,000
Minimum [Member]
Stock Compensation Plans (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%
Maximum [Member]
Stock Compensation Plans (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		200.00%
Employee Stock [Member]
Stock Compensation Plans (Textual) [Abstract]
Shares available for future issuance	5,773,954	5,773,954
Discount rate on purchase of common stock under Employee Stock Purchase Plan		5.00%	5.00%	15.00%
Shares available for sale to eligible employees	15,400,000	15,400,000
Number of shares sold		688,655	768,380	729,598
Weighted average per share fair value of discount		$ 1.00	$ 1.03	$ 1.24