BUSINESS SEGMENTS - Revenue From External Customers by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Jan. 03, 2020	[1]	Sep. 27, 2019	[2]	Jun. 28, 2019	[3]	Mar. 29, 2019	[4]	Dec. 28, 2018	[5]	Sep. 28, 2018	[6]	Jun. 29, 2018	[7]	Mar. 30, 2018	[8]	Jan. 03, 2020	Dec. 28, 2018	Dec. 29, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 2,252.3		$ 2,222.2		$ 2,262.6		$ 2,108.5		$ 2,119.1		$ 2,179.0		$ 2,137.9		$ 1,964.2		$ 8,845.6	$ 8,400.2	$ 7,927.4
Percentage of total net sales																	100.00%	100.00%	100.00%
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	$ 7,152.6	$ 6,842.1	$ 6,544.0
Percentage of total net sales																	80.90%	81.50%	82.50%
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	$ 625.5	$ 660.3	$ 626.3
Percentage of total net sales																	7.00%	7.80%	7.90%
Emerging Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	$ 1,067.5	$ 897.8	$ 757.1
Percentage of total net sales																	12.10%	10.70%	9.60%
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	$ 6,294.6	$ 6,004.7	$ 5,771.5
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales																	$ 858.0	$ 837.4	$ 772.5

[1] In the fourth quarter of 2019, "Operating income" includes $8.6 million of intangible asset amortization and $12.8 million of merger costs. "Net income" includes a $45.9 million tax benefit related to the reversal of deferred income tax valuation allowances, partially offset by $0.8 million of tax expense related to prior year tax positions.

[2] In the third quarter of 2019, "Operating income" includes $8.8 million of intangible asset amortization.

[3] In the second quarter of 2019, "Operating income" includes $8.8 million of intangible asset amortization.

[4] In the first quarter of 2019, "Operating income" includes $8.8 million of intangible asset amortization and a reversal of acquisition and integration costs of $0.3 million.

[5] In the fourth quarter of 2018, "Operating income" includes $8.7 million of intangible asset amortization and $0.2 million of U.K. facility relocation costs. "Income before income taxes" includes a $4.6 million loss on extinguishment of debt.

[6] In the third quarter of 2018, "Operating income" includes $9.6 million of intangible asset amortization, a restructuring charge of $0.2 million, $0.3 million of acquisition and integration costs and $0.2 million of U.K. facility relocation costs.

[7] In the second quarter of 2018, "Operating income" includes $9.7 million of intangible asset amortization, a restructuring charge of $9.2 million, $2.3 million of acquisition and integration costs, $2.6 million of CEO retirement agreement expense and $0.4 million of U.K. facility relocation costs.

[8] In the first quarter of 2018, "Operating income" includes $9.3 million of intangible asset amortization, $0.3 million of acquisition and integration costs and $0.2 million of U.K. facility relocation costs.