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LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS (Details)		1 Months Ended
	Mar. 30, 2016 USD ($) payment	Apr. 30, 2015 USD ($)	Dec. 31, 2016 USD ($)	Mar. 29, 2016 USD ($)	Dec. 26, 2015 USD ($)	Jun. 27, 2015 USD ($)	Mar. 31, 2015 USD ($)
Debt Instrument [Line Items]
Weighted average interest rate			1.89%		1.33%
Credit facility	$ 1,650,000,000.00	$ 1,300,000,000.0		$ 1,300,000,000.0			$ 970,000,000
Capitalized debt issuance costs	3,300,000
Expensed debt issuance costs	1,400,000
Maximum increase to the term loan and/or revolving line of credit	$ 500,000,000
Letter of Credit
Debt Instrument [Line Items]
Amount outstanding under letters of credit			$ 4,900,000		$ 4,900,000
Credit facility
Debt Instrument [Line Items]
Minimum EBITDA less capital expenditures to consolidated cash interest expense	3.50
Maximum consolidated indebtedness to consolidated EBITDA	4.25
Maximum consolidated indebtedness to consolidated EBITDA, with step downs	3.50
Capital Lease Obligation | Argenta and BioFocus UK
Debt Instrument [Line Items]
Capital lease obligations						$ 35,800,000
Federal Funds Rate
Debt Instrument [Line Items]
Interest rate	0.50%	0.50%
LIBOR
Debt Instrument [Line Items]
Interest rate	1.00%	1.00%
Term Loan Facility
Debt Instrument [Line Items]
Credit facility	$ 650,000,000.0	$ 400,000,000.0
Number of quarterly installment payments | payment	19
Multi-currency Revolving Facility
Debt Instrument [Line Items]
Credit facility	$ 1,000,000,000.0	$ 900,000,000.0

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