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Share-Based Compensation - Outstanding and Exercisable Options Ranges (Detail) $ / shares in Units, shares in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Options Outstanding, Number of Shares | shares | 7.2
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price Per Share (usd per share) | $ 164.16
Options Outstanding, Aggregate Intrinsic Value | $ | $ 1,447,200,000
Options Exercisable, Number of Shares | shares | 5.7
Options Exercisable, Weighted Average Remaining Contractual Life | 4 years 10 months 24 days
Options Exercisable, Weighted Average Exercise Price Per Share (usd per share) | $ 147.32
Options Exercisable, Aggregate Intrinsic Value | $ | $ 1,234,400,000
Closing stock price (usd per share) | $ | $ 364.94
Exercise Price Range 1 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, minimum (usd per share) | $ 31.96
Range of Exercise Prices, maximum (usd per share) | $ 113.73
Options Outstanding, Number of Shares | shares | 1.6
Options Outstanding, Weighted Average Remaining Contractual Life | 2 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price Per Share (usd per share) | $ 92.43
Options Exercisable, Number of Shares | shares | 1.6
Options Exercisable, Weighted Average Exercise Price Per Share (usd per share) | $ 92.43
Exercise Price Range 2 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, minimum (usd per share) | 114.61
Range of Exercise Prices, maximum (usd per share) | $ 153.05
Options Outstanding, Number of Shares | shares | 1.5
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 10 months 24 days
Options Outstanding, Weighted Average Exercise Price Per Share (usd per share) | $ 140.19
Options Exercisable, Number of Shares | shares | 1.4
Options Exercisable, Weighted Average Exercise Price Per Share (usd per share) | $ 139.87
Exercise Price Range 3 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, minimum (usd per share) | 155.57
Range of Exercise Prices, maximum (usd per share) | $ 172.44
Options Outstanding, Number of Shares | shares | 1.6
Options Outstanding, Weighted Average Remaining Contractual Life | 5 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price Per Share (usd per share) | $ 169.56
Options Exercisable, Number of Shares | shares | 1.4
Options Exercisable, Weighted Average Exercise Price Per Share (usd per share) | $ 169.67
Exercise Price Range 4 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, minimum (usd per share) | 172.76
Range of Exercise Prices, maximum (usd per share) | $ 213.77
Options Outstanding, Number of Shares | shares | 1.4
Options Outstanding, Weighted Average Remaining Contractual Life | 6 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price Per Share (usd per share) | $ 184.30
Options Exercisable, Number of Shares | shares | 1.0
Options Exercisable, Weighted Average Exercise Price Per Share (usd per share) | $ 185.29
Exercise Price Range 5 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices, minimum (usd per share) | 213.97
Range of Exercise Prices, maximum (usd per share) | $ 391.04
Options Outstanding, Number of Shares | shares | 1.1
Options Outstanding, Weighted Average Remaining Contractual Life | 9 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price Per Share (usd per share) | $ 266.31
Options Exercisable, Number of Shares | shares | 0.3
Options Exercisable, Weighted Average Exercise Price Per Share (usd per share) | $ 250.46

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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options 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 -URI http://asc.fasb.org/extlink&oid=96867065&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=96867065&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=96867065&loc=d3e5070-113901 + Details
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