v2.4.0.6

Stock-Based Compensation (Summary Of Changes Of Stock Options) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Shares, Beginning of Period	16.3	16.3	16.4
Granted, Shares	1.0	1.5	3.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		(0.1)
Forfeited / expired, Shares	(1.9)	(1.4)	(3.3)
Outstanding Shares, End of Period	15.4	16.3	16.3
Weighted Average Exercise Price, Outstanding, Beginning of Period	$ 22	$ 22	$ 26
Granted, Weighted Average Exercise Price	$ 19	$ 14	$ 8
Forfeited / expired, Weighted Average Exercise Price	$ 23	$ 23	$ 26
Weighted Average Exercise Price, Outstanding, End of Period	$ 21	$ 22	$ 22
Outstanding at period end, Aggregate Intrinsic Value Exercisable	$ 25.3	$ 35.4	$ 21.1	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	15.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 21
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	5.4
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 24	$ 26	$ 26	$ 27
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 7	$ 5	$ 2
Share Based Compensation Arrangement By Share Based Payment Award, Options Exercises In Period, Weighted Average Ex Price		$ 9
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value		$ 0.5
Outstanding, Exercisable, Beginning	8.9	7.6	6.6
Outstanding, Exercisable, Ending	9.8	8.9	7.6

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award, Options Exercises In Period, Weighted Average Ex Price

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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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.

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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.

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The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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

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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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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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