Stockholder's Equity (Directors' Restricted Stock Activity) (Details) - $ / shares	12 Months Ended
Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Weighted average fair value per share
Grant date fair value of stock options granted (in USD per share)	$ 72.00	$ 71.89	$ 48.45
Restricted stock
Shares
Issued (in shares)	(35,330)	(28,855)	(30,704)
Weighted average fair value per share
Weighted average fair value per share, beginning balance (in USD per share)	$ 108.05	$ 90.72	$ 83.68
Weighted average fair value per share, issued (in USD per share)	72.91	92.74	87.98
Weighted average fair value per share, ending balance (in USD per share)	$ 158.62	$ 108.05	$ 90.72
Non-Employee Director \| Restricted stock
Shares
Beginning balance (in shares)	7,752	8,373	11,307
Granted in period (in shares)	4,155	5,112	7,371
Issued (in shares)	(2,840)	(5,733)	(10,305)
Ending balance (in shares)	9,067	7,752	8,373
Weighted average fair value per share
Weighted average fair value per share, beginning balance (in USD per share)	$ 170.00	$ 131.25	$ 97.16
Grant date fair value of stock options granted (in USD per share)	251.23	193.39	134.26
Weighted average fair value per share, issued (in USD per share)	193.39	134.26	96.00
Weighted average fair value per share, ending balance (in USD per share)	$ 199.90	$ 170.00	$ 131.25

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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- Definition

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

+ References

No definition available.

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- Definition

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

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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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- Definition

Net number of non-option equity instruments granted to participants.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ 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
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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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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No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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