Stock-Based Compensation (Schedule of Other Stock-Based Awards Activity) (Details) shares in Thousands	12 Months Ended
Dec. 31, 2019 $ / shares shares
Time-Vested Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Nonvested at January 1, 2019 \| shares	75
Granted \| shares	163
Vested \| shares	(71)
Forfeited \| shares	(11)
Nonvested at December 31, 2019 \| shares	156
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Nonvested at January 1, 2019, Weighted-Average Grant-Date Fair Value \| $ / shares	$ 117.99
Granted, Weighted-Average Grant-Date Fair Value \| $ / shares	121.05
Vested, Weighted-Average Grant-Date Fair Value \| $ / shares	113.59
Forfeited, Weighted-Average Grant-Date Fair Value \| $ / shares	117.67
Nonvested at December 31, 2019, Weighted-Average Grant-Date Fair Value \| $ / shares	$ 123.15
Performance-based restricted share units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Nonvested at January 1, 2019 \| shares	1,565
Granted \| shares	661
Vested \| shares	(483)
Forfeited \| shares	(159)
Nonvested at December 31, 2019 \| shares	1,584
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Nonvested at January 1, 2019, Weighted-Average Grant-Date Fair Value \| $ / shares	$ 119.37
Granted, Weighted-Average Grant-Date Fair Value \| $ / shares	122.59
Vested, Weighted-Average Grant-Date Fair Value \| $ / shares	125.99
Forfeited, Weighted-Average Grant-Date Fair Value \| $ / shares	118.98
Nonvested at December 31, 2019, Weighted-Average Grant-Date Fair Value \| $ / shares	$ 118.71

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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=109197908&loc=d3e5070-113901

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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

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-Publisher FASB
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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).

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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

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Paragraph 2
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
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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.

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