Share-Based Compensation - Summary of Restricted Stock Award Activity (Detail) - $ / shares	6 Months Ended
Jun. 29, 2019	Jun. 30, 2018
Restricted Stock Awards
Restricted Stock Awards and Units
Outstanding at beginning of period (in shares)	657,724
Granted (in shares)	167,237
Vested (in shares)	(351,521)
Forfeited (in shares)	(9,078)
Outstanding at end of period (in shares)	464,362
Weighted-Average Grant Date Fair Value
Outstanding at beginning of year (USD per share)	$ 93.45
Granted (USD per share)	203.80
Vested (USD per share)	71.98
Forfeited (USD per share)	115.84
Outstanding at end of year (USD per share)	$ 148.99
Restricted Stock Awards \| Nonemployee directors
Restricted Stock Awards and Units
Granted (in shares)	7,371	7,980
Restricted Stock Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Shares
Restricted Stock Awards and Units
Outstanding at beginning of period (in shares)	259,727
Granted (in shares)	145,828
Vested (in shares)	(229,122)
Forfeited (in shares)	(5,215)
Outstanding at end of period (in shares)	171,218
Weighted-Average Grant Date Fair Value
Outstanding at beginning of year (USD per share)	$ 86.41
Granted (USD per share)	205.12
Vested (USD per share)	120.30
Forfeited (USD per share)	80.42
Outstanding at end of year (USD per share)	$ 142.24
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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

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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.

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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).

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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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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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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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