SEGMENT INFORMATION - Adjusted EBITDA, Depreciation & Software Amortization, Other Intangible Amortization for Each Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jul. 29, 2018	Jul. 30, 2017	Jul. 29, 2018	Jul. 30, 2017
SEGMENT INFORMATION
Adjusted EBITDA	$ 246	$ 208	$ 436	$ 365
Depreciation & Software Amortization	21	19	40	38
Other Intangible Amortization	6	3	11	6
Facilities Maintenance \| Reportable segment
SEGMENT INFORMATION
Adjusted EBITDA	150	145	273	253
Depreciation & Software Amortization	9	8	18	17
Other Intangible Amortization	2	3	4	5
Construction & Industrial \| Reportable segment
SEGMENT INFORMATION
Adjusted EBITDA	96	63	163	112
Depreciation & Software Amortization	12	$ 11	22	21
Other Intangible Amortization	$ 4		$ 7	$ 1

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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