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BUSINESS SEGMENTS AND GEOGRAPHIC AREAS - Business Segments (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 28, 2019	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Jan. 03, 2015
Segment Reporting Information [Line Items]
Net Sales	$ 3,714.2	$ 3,633.1	$ 3,761.3	$ 3,333.6	$ 3,634.7	$ 3,494.8	$ 3,643.6	$ 3,209.3	$ 14,442.2	$ 13,982.4	$ 12,966.6
Segment Profit									1,994.0	1,882.2	1,996.5
Corporate overhead									(229.5)	(202.8)	(217.4)
Other-net									(249.1)	(287.0)	(269.2)
Gain (Loss) on Disposition of Business						$ (13.7)			17.0	(0.8)	264.1
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement									0.0	0.0	(12.2)
Restructuring charges and asset impairments									(154.1)	(160.3)	(51.5)
Gain (Loss) on Extinguishment of Debt									(17.9)	0.0	0.0	$ 0.1
Interest income									53.9	68.7	40.1
Interest expense									(284.3)	(277.9)	(222.6)
Earnings before income taxes and equity interest									1,130.0	1,022.1	1,527.8
Capital and Software Expenditures									424.7	492.1	442.4
Depreciation and amortization of property, plant and equipment									372.8	331.2	296.9
Total Assets	(20,596.6)				(19,097.7)				(20,596.6)	(19,408.0)	(19,097.7)
Construction and Do It Yourself
Segment Reporting Information [Line Items]
Net Sales									10,062.1	9,814.0	9,045.0
Segment Profit									1,533.3	1,393.1	1,438.9
Capital and Software Expenditures									297.2	353.7	327.2
Depreciation And Amortization excluding Discontinued Operations									327.8	300.1	271.9
Securities Industry [Member]
Segment Reporting Information [Line Items]
Capital and Software Expenditures									37.9	42.6	39.0
Depreciation And Amortization excluding Discontinued Operations									73.1	80.5	81.4
Total Segments excluding Non Op [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of property, plant and equipment									560.2	506.5	460.7
Industrial Segment
Segment Reporting Information [Line Items]
Capital and Software Expenditures									89.6	95.8	76.2
Depreciation And Amortization excluding Discontinued Operations									159.3	125.9	107.4
Corporate Assets
Segment Reporting Information [Line Items]
Total Assets	(701.4)				(592.9)				(701.4)	(748.7)	(592.9)
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Total Assets	(21,298.0)				(19,690.6)				(21,298.0)	(20,156.7)	(19,690.6)
Continuing Operations [Member] | Construction and Do It Yourself
Segment Reporting Information [Line Items]
Total Assets	(13,642.4)				(12,870.3)				(13,642.4)	(13,122.6)	(12,870.3)
Continuing Operations [Member] | Securities Industry [Member]
Segment Reporting Information [Line Items]
Net Sales									1,945.4	1,980.6	1,947.3
Segment Profit									126.6	169.3	211.7
Total Assets	(4,207.0)				(3,413.3)				(4,207.0)	(3,620.5)	(3,413.3)
Continuing Operations [Member] | Industrial Segment
Segment Reporting Information [Line Items]
Net Sales									2,434.7	2,187.8	1,974.3
Segment Profit									334.1	319.8	345.9
Total Assets	$ (3,448.6)				$ (3,407.0)				$ (3,448.6)	$ (3,413.6)	$ (3,407.0)
Home Depot [Member] | Construction and Do It Yourself
Segment Reporting Information [Line Items]
Percentage Of Net Sales									15.00%	14.00%	13.00%

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