Share-based Compensation, Options Outstanding, Exercise Price Range, Lower Range Limit

No definition available.

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- Definition

Share-based Compensation, Options Outstanding, Exercise Price Range, Upper Range Limit

+ References

No definition available.

+ Details

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- Definition

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.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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

+ Details

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- Definition

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

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)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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

+ Details

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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 Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(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.

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.

Reference 4: 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

+ Details

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- Definition

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

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)(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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

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

+ Details

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- Definition

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-SubTopic 10

-Topic 718

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

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Stock Options Outstanding and Exercisable (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011 Year	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Per Share - Lower Range	$ 14.99
Range of Exercise Prices Per Share - Upper Range	$ 67.67
Options Outstanding - Stock Option Shares Outstanding	14,563	14,506	16,417	16,336
Options Outstanding - Wgtd.-Avg. Remaining Contractual Life (Yrs.)	5.0
Options Outstanding - Wgtd.-Avg. Exercise Price Per Share	$ 42.76	$ 41.06	$ 37.89	$ 37.95
Options Exercisable - Stock Option Shares Exercisable	11,246	10,720	12,523
Options Exercisable - Wgtd.-Avg. Exercise Price Per Share	$ 43.54
Range 1
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Per Share - Lower Range	$ 14.99
Range of Exercise Prices Per Share - Upper Range	$ 31.71
Options Outstanding - Stock Option Shares Outstanding	3,125
Options Outstanding - Wgtd.-Avg. Remaining Contractual Life (Yrs.)	3.9
Options Outstanding - Wgtd.-Avg. Exercise Price Per Share	$ 27.25
Options Exercisable - Stock Option Shares Exercisable	1,959
Options Exercisable - Wgtd.-Avg. Exercise Price Per Share	$ 30.33
Range 2
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Per Share - Lower Range	$ 31.73
Range of Exercise Prices Per Share - Upper Range	$ 40.43
Options Outstanding - Stock Option Shares Outstanding	3,549
Options Outstanding - Wgtd.-Avg. Remaining Contractual Life (Yrs.)	3.6
Options Outstanding - Wgtd.-Avg. Exercise Price Per Share	$ 39.44
Options Exercisable - Stock Option Shares Exercisable	3,212
Options Exercisable - Wgtd.-Avg. Exercise Price Per Share	$ 39.55
Range 3
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Per Share - Lower Range	$ 40.61
Range of Exercise Prices Per Share - Upper Range	$ 47.06
Options Outstanding - Stock Option Shares Outstanding	3,200
Options Outstanding - Wgtd.-Avg. Remaining Contractual Life (Yrs.)	5.8
Options Outstanding - Wgtd.-Avg. Exercise Price Per Share	$ 44.69
Options Exercisable - Stock Option Shares Exercisable	2,371
Options Exercisable - Wgtd.-Avg. Exercise Price Per Share	$ 44.12
Range 4
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Per Share - Lower Range	$ 47.23
Range of Exercise Prices Per Share - Upper Range	$ 57.90
Options Outstanding - Stock Option Shares Outstanding	3,476
Options Outstanding - Wgtd.-Avg. Remaining Contractual Life (Yrs.)	6.4
Options Outstanding - Wgtd.-Avg. Exercise Price Per Share	$ 51.59
Options Exercisable - Stock Option Shares Exercisable	2,491
Options Exercisable - Wgtd.-Avg. Exercise Price Per Share	$ 49.51
Range 5
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices Per Share - Lower Range	$ 61.81
Range of Exercise Prices Per Share - Upper Range	$ 67.67
Options Outstanding - Stock Option Shares Outstanding	1,213
Options Outstanding - Wgtd.-Avg. Remaining Contractual Life (Yrs.)	6.1
Options Outstanding - Wgtd.-Avg. Exercise Price Per Share	$ 62.08
Options Exercisable - Stock Option Shares Exercisable	1,213
Options Exercisable - Wgtd.-Avg. Exercise Price Per Share	$ 62.08