SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Adopted Accounting Principles (Details) £ in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 29, 2018 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 30, 2018 USD ($)	Jan. 01, 2018 USD ($)	Dec. 31, 2016 GBP (£)	Dec. 31, 2016 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 1,954,344		$ 2,027,596	$ 1,954,344
Operating income			202,280	267,080	$ 245,374
Other			(19,270)	1,292	16,384
Cash and cash equivalents									$ 399,948
Net cash flows from operating activities			153,008	133,148	232,820
Calculated under Revenue Guidance in Effect before Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	9,771		2,013,184	9,771
Operating income			196,092
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact of accounting standard updates							$ 9,771
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	1,964,115		14,412	1,964,115
Revenue from contract with customer	51,507
Operating income	13,121		$ 6,188
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other				648	$ 1,870
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents | £								£ 10,000
Net cash flows from operating activities		$ (12,568)
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact of accounting standard updates							1,038
Retained earnings | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact of accounting standard updates							9,771
Retained earnings | Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact of accounting standard updates	$ 1,038			$ 1,038			$ 1,038
Subsequent Event | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability						$ 100,000
Right-of-use asset						115,000
Maximum | Subsequent Event | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability						120
Right-of-use asset						$ 125,000