SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Indefinite and Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Intangible Assets [Line Items]
Gross carrying amount	$ 511.0	$ 510.0
Accumulated amortization	(132.2)	(94.6)
Customer Relationships [Member]
Intangible Assets [Line Items]
Gross carrying amount	464.5	458.5
Accumulated amortization	(113.2)	(80.1)
Exclusive Supplier Agreement [Member]
Intangible Assets [Line Items]
Gross carrying amount	22.5	22.1
Accumulated amortization	(3.5)	(2.4)
Trade Names [Member]
Intangible Assets [Line Items]
Gross carrying amount, finite trade names	12.8	12.6
Accumulated amortization	(10.2)	(7.5)
Non-compete Agreements [Member]
Intangible Assets [Line Items]
Gross carrying amount	6.3	6.2
Accumulated amortization	(5.3)	(4.6)
Indefinite-Lived Trade Names [Member]
Intangible Assets [Line Items]
Gross carrying amount	$ 4.9	$ 10.6
Minimum [Member] | Customer Relationships [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years
Minimum [Member] | Trade Names [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Minimum [Member] | Non-compete Agreements [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum [Member] | Customer Relationships [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Maximum [Member] | Exclusive Supplier Agreement [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	21 years
Maximum [Member] | Trade Names [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member] | Non-compete Agreements [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years