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

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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
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-Publisher FASB
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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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 (e)(1)
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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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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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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.

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Share-Based Compensation Arrangement By Share-Based Payment Award, Actual Payout, Percentage

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Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Adjustments Above (Below) Target, Weighted Average Grant Date Fair Value

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Number of Shares Issuable Upon Vesting

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Stock-Based Compensation - Nonvested Performance-based Award Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Non-Employee Directors \| Deferred compensation plans and restricted share awards
Non-vested PSU Awards [Roll Forward]
Granted at target level (in shares)	4,827	6,034
Non-vested PSU Awards, Weighted Average Fair Value [Roll Forward]
Granted at target level (in dollars per share)	$ 300.78	$ 338.38
Stock-settled PSU awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares to be issued upon conversion (in shares)	94,480
Average remaining term of shares issued at conversion	1 year
Non-vested PSU Awards [Roll Forward]
Outstanding, beginning (in shares)	164,474
Granted at target level (in shares)	32,109
Adjustments above/(below) target (in shares)	68,426
Vested and converted (in shares)	(144,490)
Forfeited (in shares)	(7,966)
Outstanding, ending (in shares)	112,553	164,474
Non-vested PSU Awards, Weighted Average Fair Value [Roll Forward]
Outstanding, beginning (in dollars per share)	$ 179.88
Granted at target level (in dollars per share)	362.40	$ 333.58	$ 177.31
Adjustments above/(below) target (in dollars per share)	106.57
Vested and converted (in dollars per share)	369.13
Forfeited (in dollars per share)	240.19
Outstanding, ending (in dollars per share)	$ 278.38	$ 179.88
Stock-settled PSU awards \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Actual payout range	0.00%
Stock-settled PSU awards \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Actual payout range	200.00%
Performance share units, cash-settled
Non-vested PSU Awards [Roll Forward]
Outstanding, beginning (in shares)	1,318
Granted at target level (in shares)	136
Adjustments above/(below) target (in shares)	507
Vested and converted (in shares)	(1,071)
Forfeited (in shares)	0
Outstanding, ending (in shares)	890	1,318
Non-vested PSU Awards, Weighted Average Fair Value [Roll Forward]
Outstanding, beginning (in dollars per share)	$ 169.53
Granted at target level (in dollars per share)	369.13
Adjustments above/(below) target (in dollars per share)	104.44
Vested and converted (in dollars per share)	369.13
Forfeited (in dollars per share)	0
Outstanding, ending (in dollars per share)	$ 242.29	$ 169.53
Restricted Stock
Non-vested PSU Awards [Roll Forward]
Granted at target level (in shares)	9,648	6,002	8,721
Non-vested PSU Awards, Weighted Average Fair Value [Roll Forward]
Granted at target level (in dollars per share)	$ 310.52	$ 312.41	$ 200.35