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Schedule of Weighted Average Remaining Contractual Life for Options Outstanding and Weighted Average Exercise Price Per Share for Exercisable Options (Detail) (USD $) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |
Options Outstanding, Shares | 7,620,958 |  | 7,436,238 | 7,558,945 | 6,594,950
Options Outstanding, Weighted Average Exercise Price Per Share | $ 43.63 |  | $ 36.31 | $ 31.63 | $ 25.16
Options Outstanding, Weighted Average Remaining Contractual Life (in Years) | 2 years 10 months 24 days |  |  |  |
Exercisable Options, Shares | 1,756,128 |  |  |  |
Weighted average exercise price per share, Options Exercisable | $ 35.60 |  |  |  |
Expected to Vest Options , Shares | 5,233,188 | [1] |  |  |
Expected to Vest Options, Weighted Average Exercise Price Per Share | $ 46.04 | [1] |  |  |
Range One |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |
Range, Low | $ 30.32 |  |  |  |
Range, High | $ 36.95 |  |  |  |
Options Outstanding, Shares | 3,183,583 |  |  |  |
Options Outstanding, Weighted Average Exercise Price Per Share | $ 35.14 |  |  |  |
Options Outstanding, Weighted Average Remaining Contractual Life (in Years) | 2 years 4 months 24 days |  |  |  |
Exercisable Options, Shares | 1,259,453 |  |  |  |
Weighted average exercise price per share, Options Exercisable | $ 32.45 |  |  |  |
Expected to Vest Options , Shares | 1,716,901 | [1] |  |  |
Expected to Vest Options, Weighted Average Exercise Price Per Share | $ 36.91 | [1] |  |  |
Range Two |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |
Range, Low | $ 38.12 |  |  |  |
Range, High | $ 43.67 |  |  |  |
Options Outstanding, Shares | 1,685,350 |  |  |  |
Options Outstanding, Weighted Average Exercise Price Per Share | $ 43.56 |  |  |  |
Options Outstanding, Weighted Average Remaining Contractual Life (in Years) | 2 years 1 month 6 days |  |  |  |
Exercisable Options, Shares | 496,175 |  |  |  |
Weighted average exercise price per share, Options Exercisable | $ 43.58 |  |  |  |
Expected to Vest Options , Shares | 1,061,101 | [1] |  |  |
Expected to Vest Options, Weighted Average Exercise Price Per Share | $ 43.55 | [1] |  |  |
Range Three |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |
Range, Low | $ 44.83 |  |  |  |
Range, High | $ 53.38 |  |  |  |
Options Outstanding, Shares | 2,724,525 |  |  |  |
Options Outstanding, Weighted Average Exercise Price Per Share | $ 53.36 |  |  |  |
Options Outstanding, Weighted Average Remaining Contractual Life (in Years) | 4 years |  |  |  |
Exercisable Options, Shares | 500 |  |  |  |
Weighted average exercise price per share, Options Exercisable | $ 46.97 |  |  |  |
Expected to Vest Options , Shares | 2,430,648 | [1] |  |  |
Expected to Vest Options, Weighted Average Exercise Price Per Share | $ 53.36 | [1] |  |  |
Range Four |  |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |
Range, Low | $ 54.79 |  |  |  |
Range, High | $ 79.79 |  |  |  |
Options Outstanding, Shares | 27,500 |  |  |  |
Options Outstanding, Weighted Average Exercise Price Per Share | $ 67.64 |  |  |  |
Options Outstanding, Weighted Average Remaining Contractual Life (in Years) | 4 years |  |  |  |
Exercisable Options, Shares | 0 |  |  |  |
Expected to Vest Options , Shares | 24,538 | [1] |  |  |
Expected to Vest Options, Weighted Average Exercise Price Per Share | $ 67.64 | [1] |  |  |
[1] | Assumes a weighted average forfeiture rate of 10.8%.

X
- Definition Number of options outstanding, including both vested and non-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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 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)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price 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 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 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. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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