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Stock-Based Compensation (Summary Of Non-Vested Stock Award Activity Under Incentive Plan) (Details) shares in Thousands | 12 Months Ended
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Dec. 31, 2019 $ / shares shares
Restricted Stock Units - 2011 Stock Incentive Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Outstanding, beginning of year, Shares | shares | 154
Outstanding, beginning of year, Grant Date Fair Value | $ / shares | $ 352.85
Granted, Shares | shares | 28
Granted, Grant Date Fair Value | $ / shares | $ 627.94
Vested, Shares | shares | (46)
Vested, Grant Date Fair Value | $ / shares | $ 388.08
Forfeited, Shares | shares | (15)
Forfeited, Grant Date Fair Value | $ / shares | $ 303.84
Outstanding, end of year, Shares | shares | 121
Outstanding, end of year, Grant Date Fair Value | $ / shares | $ 408.56
Vested and expected to vest, end of year, Shares | shares | 113
Vested and expected to vest, end of year, Grant Date Fair Value | $ / shares | $ 401.74
Performance Shares - 2011 Stock Incentive Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Outstanding, beginning of year, Shares | shares | 70
Outstanding, beginning of year, Grant Date Fair Value | $ / shares | $ 418.52
Granted, Shares | shares | 46
Granted, Grant Date Fair Value | $ / shares | $ 583.13
Vested, Shares | shares | 0
Vested, Grant Date Fair Value | $ / shares | $ 0
Expired, Shares | shares | (13)
Expired, Grant Date Fair Value | $ / shares | $ 518.62
Outstanding, end of year, Shares | shares | 103
Outstanding, end of year, Grant Date Fair Value | $ / shares | $ 479.83
Vested and expected to vest, end of year, Shares | shares | 227
Vested and expected to vest, end of year, Grant Date Fair Value | $ / shares | $ 479.61

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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were expired or put into effect as a result of the occurrence of a terminating event. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were expired during the reporting period. + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest, Outstanding, Number + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrumets Other than Options, Vested and Expected to Vest, Exercisable, Weighted Average Grant Date Fair Value Per Share + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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