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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Newly Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Jan. 01, 2019
New Accounting Pronouncement, Early Adoption [Line Items]
Amount reclassified from accumulated other comprehensive loss due to the adoption of ASU 2018-02 (See Note 1)									$ 3,330
Adjustments to operating income related to adoption of new accounting guidance	$ 102,482	$ 84,362	$ 76,710	$ 67,829	$ 62,827	$ 74,062	$ 81,686	$ 69,706	331,383	$ 288,282	$ 237,552
Adjustments to other assets as a result of adoption of new accounting guidance	143,759				124,002				143,759	124,002
Adjustment to retained earnings as a result of newly adopted accounting guidance	42,096				288,658				42,096	288,658
Adjustment to deferred tax assets as a result of newly adopted accounting guidance	23,386				22,654				23,386	22,654
Reduction in property, plant and equipment, net	(932,877)				(781,973)				(932,877)	(781,973)
Reduction in capital lease obligations	(1,636,598)				$ (1,114,105)				(1,636,598)	(1,114,105)
Unallocated corporate
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance									(168,874)	(133,000)	(138,806)
RMS
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance									136,468	114,588	136,418
DSA
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance									227,577	182,796	135,379
Manufacturing
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance									136,212	123,898	104,561
Accounting Standards Update 2018-02
New Accounting Pronouncement, Early Adoption [Line Items]
Amount reclassified from accumulated other comprehensive loss due to the adoption of ASU 2018-02 (See Note 1)									3,300
Accounting Standards Update 2017-07
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance										800	100
Accounting Standards Update 2017-07 | Unallocated corporate
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance										2,200	2,800
Accounting Standards Update 2017-07 | RMS
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance										(100)	100
Accounting Standards Update 2017-07 | DSA
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance										(1,300)	(2,800)
Accounting Standards Update 2017-07 | Manufacturing
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to operating income related to adoption of new accounting guidance										$ (100)	$ (100)
Accounting Standards Update 2016-01
New Accounting Pronouncement, Early Adoption [Line Items]
Adjustments to other assets as a result of adoption of new accounting guidance	1,900								1,900
Adjustment to retained earnings as a result of newly adopted accounting guidance	1,400								1,400
Adjustment to deferred tax assets as a result of newly adopted accounting guidance	$ 500								$ 500
Accounting Standards Update 2016-02 | Scenario, Forecast
New Accounting Pronouncement, Early Adoption [Line Items]
Reduction in property, plant and equipment, net												$ 26,000
Reduction in capital lease obligations												26,000
Right-of-use asset, operating leases												130,000
Operating lease liability												$ 130,000

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