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Goodwill and Other Intangible Assets - Narrative (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Apr. 03, 2021 | Mar. 28, 2020 | Jan. 02, 2021
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Goodwill | $ 1,161,800,000 |  | $ 982,400,000
Accumulated impairment losses | $ 0 |  |
Weighted-average amortization period (in years) | 11 years |  |
Aggregate amortization expense | $ 6,000,000.0 | $ 5,700,000 |
Estimated annual amortization expense for fiscal period 2021 | 20,400,000 |  |
Estimated annual amortization expense for fiscal period 2022 | 20,700,000 |  |
Estimated annual amortization expense for fiscal period 2023 | 17,600,000 |  |
Estimated annual amortization expense for fiscal period 2024 | 12,600,000 |  |
Estimated annual amortization expense for fiscal period 2025 | 8,300,000 |  |
Estimated annual amortization expense for fiscal period 2026 | 7,700,000 |  |
Dealer-FX |  |  |
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Goodwill | 195,200,000 |  |
AutoCrib |  |  |
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Goodwill | $ 18,300,000 |  |
Customer relationships |  |  |
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Weighted-average amortization period (in years) | 15 years |  |
Customer relationship contractual term, minimum (in years) | 3 years |  |
Customer relationship contractual term, maximum (in years) | 5 years |  |
Repair Systems & Information Group |  |  |
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Goodwill | $ 829,000,000.0 |  | 638,800,000
Repair Systems & Information Group | Dealer-FX |  |  |
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Goodwill | 195,200,000 |  |
Commercial & Industrial Group |  |  |
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Goodwill | 320,400,000 |  | $ 331,200,000
Commercial & Industrial Group | AutoCrib |  |  |
Acquired Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Goodwill, purchase accounting adjustments | $ 18,300,000 |  |

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