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LONG-TERM DEBT AND FINANCE LEASE OBLIGATIONS - Narrative (Details) |  |  |  | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 29, 2019 USD ($) | Apr. 03, 2018 USD ($) | Mar. 26, 2018 USD ($) payment | Jun. 29, 2019 USD ($) | Dec. 29, 2018 USD ($) | Feb. 12, 2018 USD ($) | Mar. 29, 2016 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate |  |  |  | 3.14% | 4.24% |  |
Number of consecutive fiscal quarters |  |  |  | 1 year |  |  |
Citoxlab |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Purchase price | $ 528,100,000 |  |  |  |  |  |
$1.65 Billion Credit Facility | Credit facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility |  |  |  |  |  |  | $ 1,650,000,000
$2.3 Billion Credit Facility | Credit facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility |  |  | $ 2,300,000,000 |  |  |  |
Gross debt issuance costs |  |  |  | $ 6,200,000 |  |  |
Debt issuance costs |  |  |  | 1,000,000.0 |  |  |
Maximum borrowing capacity, term loan and line of credit facility, potential increase available |  |  | $ 1,000,000,000.0 |  |  |  |
Minimum EBITDA less capital expenditures to consolidated cash interest expense ratio |  |  | 3.50 |  |  |  |
Maximum consolidated indebtedness to consolidated EBITDA |  |  | 4.50 |  |  |  |
Maximum consolidated indebtedness to consolidated EBITDA, with step-downs |  |  | 3.50 |  |  |  |
$2.3 Billion Credit Facility | Credit facility | Federal Funds Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate |  |  | 0.50% |  |  |  |
$2.3 Billion Credit Facility | Credit facility | LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate |  |  | 1.00% |  |  |  |
$2.3 Billion Credit Facility | Credit facility | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility |  |  | $ 1,550,000,000 |  |  |  |
Term Loan | Credit facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility |  |  | $ 750,000,000.0 |  |  |  |
Number of quarterly installment payments | payment |  |  | 19 |  |  |  |
Senior Notes Due 2026 | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Gross debt issuance costs |  | $ 7,400,000 |  |  |  |  |
Aggregate principal amount |  | $ 500,000,000.0 |  |  |  |  |
Stated interest rate |  | 5.50% |  |  |  |  |
Redemption price percentage, conditional upon equity offerings |  | 40.00% |  |  |  |  |
Redemption price percentage in the event of a change of control |  | 101.00% |  |  |  |  |
Net proceeds from debt |  | $ 493,800,000 |  |  |  |  |
Senior Notes Due 2026 | Senior Notes | Redemption Period One |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption price percentage |  | 100.00% |  |  |  |  |
Senior Notes Due 2026 | Senior Notes | Redemption Period Two |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption price percentage |  | 105.50% |  |  |  |  |
Bridge Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility |  |  |  |  |  | $ 830,000,000 |
Gross debt issuance costs |  |  |  | 1,800,000 |  |  |
Fees paid for temporary backstop facility |  |  |  | 2,000,000.0 |  |  |
Letter of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  | 6,700,000 | $ 6,500,000 |  |
Minimum | Foreign Exchange Forward |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative amount |  |  |  | 300,000,000 |  |  |
Maximum | Foreign Exchange Forward |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Derivative amount |  |  |  | $ 350,000,000 |  |  |

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