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.

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-Name Staff Accounting Bulletin (SAB)

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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.

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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 cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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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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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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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.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period an equity-based award is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Note 23: Stock Option And Compensation Plans (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended										12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2008	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2010 Stock Options [Member]	Dec. 31, 2012 Unvested Stock and Performance Awards [Member]	Dec. 31, 2011 Unvested Stock and Performance Awards [Member]	Dec. 31, 2010 Unvested Stock and Performance Awards [Member]	Dec. 31, 2012 Stock Appreciation Rights (SARs) [Member] Omnibus Long-Term Compensation Plan (The "2005 Plan") [Member]	Dec. 31, 2012 Stock Appreciation Rights (SARs) [Member] 2000 Omnibus Long-Term Compensation Plan (The "2000 Plan") [Member] Minimum [Member]	Dec. 31, 2012 Stock Appreciation Rights (SARs) [Member] 2000 Omnibus Long-Term Compensation Plan (The "2000 Plan") [Member] Maximum [Member]	Dec. 31, 2012 Stock Appreciation Rights (SARs) [Member] 2000 Omnibus Long-Term Compensation Plan (The "2000 Plan") [Member]	Dec. 31, 2012 Omnibus Long-Term Compensation Plan (The "2005 Plan") [Member]	Dec. 31, 2012 2000 Omnibus Long-Term Compensation Plan (The "2000 Plan") [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2011 Minimum [Member]	Dec. 31, 2010 Minimum [Member]	Dec. 31, 2009 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2011 Maximum [Member]	Dec. 31, 2010 Maximum [Member]	Dec. 31, 2009 Maximum [Member]
Share-based Compensation	$ 7	$ 20	$ 21
Proceeds from Stock Options Exercised	0	0	0
Allocated Share-based Compensation Expense					2	3	4	5	17	17
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)															11,000,000	22,000,000
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Term															7 years	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	7,940,000	13,610,000	18,030,000	23,520,000							10,000			4,450
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)											$ 7.50	$ 23.25	$ 27.55				$ 2.64	$ 2.64	$ 2.64	$ 2.64	$ 36.66	$ 38.04	$ 48.34	$ 65.91
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 255 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 138 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 0	$ 1.92	$ 2.16
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 1
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	328 days