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Period used for the exchange traded option included the longest dated options.

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Share-Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Granted In Period, Fair Value

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Number of shares of equity interests issued or issuable to acquire entity.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 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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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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No definition available.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Stockholders’ Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	May 14, 2021	Mar. 31, 2021	Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021	Jan. 03, 2016	Jan. 31, 2016
Preferred Stock
Preferred stock issued (in shares)			0	0	0
Stock Incentive Plan
Pretax intrinsic value of options exercised			$ 53,700	$ 64,200
Intrinsic value of options outstanding			312,600
Intrinsic value of options exercisable			306,100
Amount of cash received from exercise of stock options			$ 23,600	$ 25,400	$ 36,300
Period used for the exchange traded option included the longest dated options			3 months
Grant date fair value of stock options granted (in USD per share)			$ 124.44	$ 134.88	$ 106.26
PSP
Stock Incentive Plan
Vesting period					3 years
Restricted Stock and Units
Performance period					3 years
Vesting period					3 years
Employee stock options
Stock Incentive Plan
Stock options maximum life			10 years
Employee stock options \| Year one
Stock Incentive Plan
Annual award vesting percentage			33.33%
Employee stock options \| Year two
Stock Incentive Plan
Annual award vesting percentage			33.33%
Employee stock options \| Year three
Stock Incentive Plan
Annual award vesting percentage			33.33%
Employee and non-employee stock option
Stock Incentive Plan
Stock option expense			$ 17,900	$ 20,000	$ 24,700
Nonvested awards unrecognized cost			$ 27,300
Weighted average period for non-vested awards expected to be recognized			1 year 6 months
Restricted Stock and Units
Stock option expense			$ 17,900	20,000	$ 24,700
Nonvested awards unrecognized cost			$ 27,300
Weighted average period for non-vested awards expected to be recognized			1 year 6 months
Time-based Restricted Stock Units
Stock Incentive Plan
Stock option expense			$ 7,800	$ 7,800
Restricted Stock and Units
Granted (in shares)			89,472	62,974	0
Weighted average fair value per share, granted (in USD per share)			$ 360.39	$ 409.41	$ 0
Stock option expense			$ 7,800	$ 7,800
Time-based Restricted Stock Units \| Non-Employee Directors Restricted Stock Units
Stock Incentive Plan
Vesting period			1 year
Stock option expense			$ 1,700	$ 1,200	$ 1,100
Restricted Stock and Units
Granted (in shares)			3,904	2,592	3,692
Weighted average fair value per share, granted (in USD per share)			$ 451.13	$ 450.27	$ 312.41
Stock option expense			$ 1,700	$ 1,200	$ 1,100
Fair value restricted stock units granted			$ 170	130	110
Vesting period			1 year
Time-based Restricted Stock Units \| Employee Performance-Based Restricted Stock Awards
Stock Incentive Plan
Stock option expense			$ 5,100	$ 3,500	$ 3,300
Nonvested awards unrecognized cost			$ 6,700
Weighted average period for non-vested awards expected to be recognized			1 year 6 months
Restricted Stock and Units
Granted (in shares)			19,492	10,227	10,080
Weighted average fair value per share, granted (in USD per share)			$ 427.51	$ 334.92	$ 360.33
Stock option expense			$ 5,100	$ 3,500	$ 3,300
Nonvested awards unrecognized cost			$ 6,700
Weighted average period for non-vested awards expected to be recognized			1 year 6 months
Performance period			3 years
Accelerated Share Repurchase Program
Treasury Stock
Number of shares authorized to be repurchased (in shares)							3,000,000
Treasury shares, acquired (in shares)						0
FLIR Systems, Inc
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	9,500,000
FLIR Systems, Inc \| Time-based Restricted Stock Units
Stock Incentive Plan
Nonvested awards unrecognized cost			$ 36,800
Weighted average period for non-vested awards expected to be recognized			2 years 6 months
Restricted Stock and Units
Unvested restricted stock units (in shares)		62,974
Nonvested awards unrecognized cost			$ 36,800
Weighted average period for non-vested awards expected to be recognized			2 years 6 months