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BUSINESS ACQUISITIONS - Narrative (Details) £ in Millions |  |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 29, 2019 USD ($) | Apr. 03, 2018 USD ($) | Jan. 11, 2018 USD ($) | Jun. 29, 2019 USD ($) | Mar. 30, 2019 USD ($) | Mar. 30, 2019 GBP (£) | Jun. 30, 2018 USD ($) | Jun. 29, 2019 USD ($) | Jun. 30, 2018 USD ($) | Sep. 29, 2018 USD ($) | Sep. 29, 2018 GBP (£) | Mar. 26, 2018 USD ($) | Jan. 11, 2018 GBP (£)
Credit facility | $2.3 Billion Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility |  |  |  |  |  |  |  |  |  |  |  | $ 2,300,000,000 |
Citoxlab |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price | $ 528,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation | 491,729,000 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, amount expected to be deductible for tax purposes | $ 7,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  | $ 12,100,000 |  |  |  | $ 17,200,000 |  |  |  |  |
Actual revenue from acquiree |  |  |  | 30,900,000 |  |  |  |  |  |  |  |  |
Actual earnings from acquiree |  |  |  | 2,000,000.0 |  |  |  |  |  |  |  |  |
Weighted average amortization life of intangible assets acquired | 12 years |  |  |  |  |  |  |  |  |  |  |  |
Citoxlab | Client relationships |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average amortization life of intangible assets acquired | 13 years |  |  |  |  |  |  |  |  |  |  |  |
MPI Research |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  | $ 829,700,000 |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation | $ 491,700,000 | 800,800,000 |  |  |  |  |  |  |  |  |  |  |
Cash acquired | $ 36,400,000 | 27,700,000 |  |  |  |  |  |  |  |  |  |  |
Goodwill, amount expected to be deductible for tax purposes |  | 4,100,000 |  |  |  |  |  |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  | 0 |  |  | $ 11,700,000 | $ 0 | $ 14,500,000 |  |  |  |
Adjustments related to prior period |  | $ 1,200,000 |  |  |  |  |  |  |  |  |  |  |
Weighted average amortization life of intangible assets acquired |  | 12 years |  |  |  |  |  |  |  |  |  |  |
MPI Research | Client relationships |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average amortization life of intangible assets acquired |  | 13 years |  |  |  |  |  |  |  |  |  |  |
KWS BioTest Limited |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 20,300,000 |  |  |  |  |  |  |  |  |  |
Purchase price allocation |  |  | 21,529,000 |  |  |  |  |  |  |  |  |  |
Cash acquired |  |  | 1,000,000.0 |  |  |  |  |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  | $ 0 |  |  | $ 0 |  | 500,000 |  |  |  |
Adjustments related to prior period |  |  | $ 400,000 |  |  |  |  |  |  |  |  |  |
Undiscounted contingent payments |  |  |  |  |  |  |  |  |  | $ 2,600,000 | £ 2.0 |  | £ 3.0
Payments for contingent liabilities |  |  |  |  | $ 2,600,000 | £ 2.0 |  |  |  |  |  |  |
KWS BioTest Limited | Client relationships |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average amortization life of intangible assets acquired |  |  |  |  |  |  |  | 12 years |  |  |  |  |
Depreciation and Amortization Expense | Citoxlab |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to prior period |  |  |  |  |  |  |  | $ 4,000,000.0 | 5,100,000 |  |  |  |
Depreciation and Amortization Expense | MPI Research |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to prior period |  |  |  |  |  |  |  |  | 9,400,000 |  |  |  |
Interest expense | Citoxlab |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to prior period |  |  |  |  |  |  |  | $ 1,200,000 | 2,000,000.0 |  |  |  |
Interest expense | MPI Research |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to prior period |  |  |  |  |  |  |  |  | $ 2,800,000 |  |  |  |

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