Share-Based Awards (Stock Options Outstanding By Price Range) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted-Average Contractual Life, options outstanding	5.0
Options	6,311	6,978
Weighted-Average Exercise Price, options outstanding	$ 37	$ 36
Weighted-Average Contractual Life, Options exercisable	3.7
Options exercisable	4,211
Weighted-Average Exercise Price, Options exercisable	$ 43
$10.01 To $20 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Price Range (lower)	$ 10.01
Price Range (upper)	$ 20
Weighted-Average Contractual Life, options outstanding	6.7
Options	1,462
Weighted-Average Exercise Price, options outstanding	$ 12
$20.01 To $30 [ Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Price Range (lower)	$ 20.01
Price Range (upper)	$ 30
Weighted-Average Contractual Life, options outstanding	7.7
Options	1,057
Weighted-Average Exercise Price, options outstanding	$ 23
$30.01 To $40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Price Range (lower)	$ 30.01
Price Range (upper)	$ 40.00
Weighted-Average Contractual Life, options outstanding	5.1
Options	908
Weighted-Average Exercise Price, options outstanding	$ 39
$40.01 To $50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Price Range (lower)	$ 40.01
Price Range (upper)	$ 50.00
Weighted-Average Contractual Life, options outstanding	4.9
Options	860
Weighted-Average Exercise Price, options outstanding	$ 42
$50.01 To $60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Price Range (lower)	$ 50.01
Price Range (upper)	$ 60.00
Weighted-Average Contractual Life, options outstanding	1.8
Options	1,142
Weighted-Average Exercise Price, options outstanding	$ 52
$60.01 To $70 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Price Range (lower)	$ 60.01
Price Range (upper)	$ 70.00
Weighted-Average Contractual Life, options outstanding	3.1
Options	882
Weighted-Average Exercise Price, options outstanding	$ 65

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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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c), d(2)

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

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-Name Accounting Standards Codification

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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.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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- Definition

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.

+ References

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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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(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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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.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

+ References

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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