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Stock-Based Compensation - Schedule of Stock-Based Compensation by Exercise Price Range (Details) shares in Thousands | 12 Months Ended
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Dec. 31, 2018 $ / shares shares
$41.78 - $60.80 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | $ 41.78
Exercise price, upper range limit (in dollars per share) | $ 60.80
Outstanding options, number (in shares) | shares | 121
Outstanding options, average exercise price (in dollars per share) | $ 48.49
Outstanding options, average remaining life | 9 months 12 days
Exercisable options, number (in shares) | shares | 121
Exercisable options, average exercise price (in dollars per share) | $ 48.49
$60.80 - $91.21 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 60.80
Exercise price, upper range limit (in dollars per share) | $ 91.21
Outstanding options, number (in shares) | shares | 149
Outstanding options, average exercise price (in dollars per share) | $ 72.06
Outstanding options, average remaining life | 2 years 2 months 12 days
Exercisable options, number (in shares) | shares | 149
Exercisable options, average exercise price (in dollars per share) | $ 72.06
$91.21 - $121.61 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 91.21
Exercise price, upper range limit (in dollars per share) | $ 121.61
Outstanding options, number (in shares) | shares | 359
Outstanding options, average exercise price (in dollars per share) | $ 107.23
Outstanding options, average remaining life | 3 years 6 months 6 days
Exercisable options, number (in shares) | shares | 359
Exercisable options, average exercise price (in dollars per share) | $ 107.23
$121.61 - $152.01 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 121.61
Exercise price, upper range limit (in dollars per share) | $ 152.01
Outstanding options, number (in shares) | shares | 436
Outstanding options, average exercise price (in dollars per share) | $ 136.54
Outstanding options, average remaining life | 5 years 24 days
Exercisable options, number (in shares) | shares | 436
Exercisable options, average exercise price (in dollars per share) | $ 136.54
$152.01 - $182.41 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 152.01
Exercise price, upper range limit (in dollars per share) | $ 182.41
Outstanding options, number (in shares) | shares | 783
Outstanding options, average exercise price (in dollars per share) | $ 169.01
Outstanding options, average remaining life | 6 years 9 months 24 days
Exercisable options, number (in shares) | shares | 498
Exercisable options, average exercise price (in dollars per share) | $ 167.63
$182.41 - $212.81 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 182.41
Exercise price, upper range limit (in dollars per share) | $ 212.81
Outstanding options, number (in shares) | shares | 534
Outstanding options, average exercise price (in dollars per share) | $ 201.40
Outstanding options, average remaining life | 8 years 1 month 18 days
Exercisable options, number (in shares) | shares | 55
Exercisable options, average exercise price (in dollars per share) | $ 186.22
$212.81 - $243.22 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 212.81
Exercise price, upper range limit (in dollars per share) | $ 243.22
Outstanding options, number (in shares) | shares | 97
Outstanding options, average exercise price (in dollars per share) | $ 230.02
Outstanding options, average remaining life | 8 years 6 months 10 days
Exercisable options, number (in shares) | shares | 8
Exercisable options, average exercise price (in dollars per share) | $ 227.94
$243.22 - $273.62 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 243.22
Exercise price, upper range limit (in dollars per share) | $ 273.62
Outstanding options, number (in shares) | shares | 27
Outstanding options, average exercise price (in dollars per share) | $ 258.82
Outstanding options, average remaining life | 9 years
Exercisable options, number (in shares) | shares | 1
Exercisable options, average exercise price (in dollars per share) | $ 260.01
$273.62 - $304.02 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 273.62
Exercise price, upper range limit (in dollars per share) | $ 304.02
Outstanding options, number (in shares) | shares | 699
Outstanding options, average exercise price (in dollars per share) | $ 279.24
Outstanding options, average remaining life | 9 years 2 months 15 days
Exercisable options, number (in shares) | shares | 0
Exercisable options, average exercise price (in dollars per share) | $ 0.00
$41.78 - 304.02 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price, lower range limit (in dollars per share) | 41.78
Exercise price, upper range limit (in dollars per share) | $ 304.02
Outstanding options, number (in shares) | shares | 3,205
Outstanding options, average exercise price (in dollars per share) | $ 180.69
Outstanding options, average remaining life | 6 years 7 months 6 days
Exercisable options, number (in shares) | shares | 1,627
Exercisable options, average exercise price (in dollars per share) | $ 129.39

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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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