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Summary of Range of Exercise Prices (Detail) | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Awards outstanding | shares | 8,533,561
Weighted average exercise price | $ 59.05
Awards exercisable | shares | 2,856,959
Weighted average exercise price | $ 47.88
Range 1 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of exercise prices, lower range | 30.01
Range of exercise prices, upper range | $ 40.00
Awards outstanding | shares | 369,301
Weighted average exercise price | $ 36.56
Awards exercisable | shares | 358,969
Weighted average exercise price | $ 36.54
Range 2 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of exercise prices, lower range | 40.01
Range of exercise prices, upper range | $ 50.00
Awards outstanding | shares | 1,437,708
Weighted average exercise price | $ 43.02
Awards exercisable | shares | 1,390,300
Weighted average exercise price | $ 42.86
Range 3 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of exercise prices, lower range | 50.01
Range of exercise prices, upper range | $ 60.00
Awards outstanding | shares | 4,143,205
Weighted average exercise price | $ 57.54
Awards exercisable | shares | 843,384
Weighted average exercise price | $ 55.30
Range 4 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of exercise prices, lower range | 60.01
Range of exercise prices, upper range | $ 70.00
Awards outstanding | shares | 1,293,564
Weighted average exercise price | $ 68.12
Awards exercisable | shares | 216,000
Weighted average exercise price | $ 65.08
Range 5 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of exercise prices, lower range | 70.01
Range of exercise prices, upper range | $ 80.00
Awards outstanding | shares | 588,733
Weighted average exercise price | $ 73.80
Awards exercisable | shares | 48,306
Weighted average exercise price | $ 70.31
Range 6 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of exercise prices, lower range | 80.01
Range of exercise prices, upper range | $ 90.00
Awards outstanding | shares | 701,050
Weighted average exercise price | $ 83.60

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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 number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(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 pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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 + 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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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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)(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 could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + 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 + Details
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