Deferred tax asset write off.

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- Definition

Fair value of restricted shares awarded.

+ References

No definition available.

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- Definition

Fair value of restricted shares cancelled.

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No definition available.

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- Definition

Incentive Stock Options And Non-Qualified Stock Options Granted Price At Fair Value Of Common Stock, Percentage

+ References

No definition available.

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- Definition

Options exercisable in years.

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- Definition

Options expire in years.

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No definition available.

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- Definition

Shares issued under other than stock options plan counted in long-term incentive plan.

+ References

No definition available.

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- Definition

Shares issued under stock options plan counted in long-term incentive plan.

+ References

No definition available.

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- Definition

Unearned compensation net of estimated forfeitures.

+ References

No definition available.

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- Definition

Unearned compensation net of estimated forfeitures expected to be recognized in years.

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No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ 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 (h)(1)(i)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

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-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

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-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-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 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

+ References

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- Definition

The cash outflow paid by the company to cover an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

No definition available.

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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 number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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- Definition

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

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(b)

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- Definition

Number of share options (or share units) exercised during the current period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.28,29)

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-Name Regulation S-X (SX)

-Number 210

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-Article 3

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-Name Regulation S-X (SX)

-Number 210

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-Name Accounting Standards Codification

-Topic 505

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

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Long-Term Incentive Plans (Narrative) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2010	Dec. 31, 2012 Y	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under Omnibus Plan in connection with stock options, count		1
ISO and NQSO granted price at fair value of common stock, percentage		100.00%
Options expired or canceled		461,805	225,874	1,493,873
Granted		2,689,542	235,050	805,776
Fair value of restricted shares awarded		$ 21	$ 2
Fair value of restricted shares cancelled		2	1
Unearned compensation, net of estimated forfeitures		20
Unearned compensation, net of estimated forfeitures, expected to be recognized, years		2.5
Options granted	1,100,000			1,100,000
Number of Options, Outstanding		5,963,268	6,425,073	6,650,947	7,044,820
After May 1, 2012 Amendment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under Omnibus Plan in connection with other than stock options, count		1.28
Prior To May 1, 2012 Amendment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under Omnibus Plan in connection with other than stock options, count		2
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable in years		4
Options expire in years		7
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable in years		5
Options expire in years		10
Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares of common stock reserved and available for issuance		10,000,000
Shareholder approved increase in common stock reserved and available for issuance		14,000,000
Options expired or canceled		461,805
Restricted Share Activity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted		2,689,542	235,050	805,776
Canceled		180,665	58,466	913,070
Shares/units available for future grants		10,131,530
Share-based compensation expense (benefit)		11	9	6
Tax benefit related to restricted share awards		1	2	2
Tax charge related to restricted share awards			1	1
Restricted Share Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted		0
Canceled		0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense (benefit)		3	4	2
Stock option awards exercised		0	0	0
Deferred tax asset write off		6	3	2
Unrecognized compensation cost		2
Expected to be recognized as expense over a weighted average period, years		1 year 4 months 24 days
Restricted Shares [Member] \| Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted		2,000,000
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expired or canceled		12,534
Shares/units available for future grants		118,354
Share-based compensation expense (benefit)		(3)	(2)	5
Options granted		0
Number of Options, Outstanding		231,646
Performance Based Awards [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units available for future grants		350,000
Deferred Cash Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense (benefit)		$ 3	$ 9	7
Deferred Cash Awards [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term incentive awards vesting period, years		3 years
Deferred Cash Awards [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term incentive awards vesting period, years		5 years