Basis of Presentation and Summary of Accounting Policies - Schedule of Goodwill by Segment (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 31, 2026	Feb. 01, 2025
Goodwill [Roll Forward]
Beginning balance	$ 94	$ 95
Effect of exchange rate changes on goodwill	2	(1)
Ending balance	96	94
Marmaxx
Goodwill [Roll Forward]
Beginning balance	70	70
Effect of exchange rate changes on goodwill	0	0
Ending balance	70	70
TJX Canada
Goodwill [Roll Forward]
Beginning balance	2	2
Effect of exchange rate changes on goodwill	0	0
Ending balance	2	2
TJX International
Goodwill [Roll Forward]
Beginning balance	22	23
Effect of exchange rate changes on goodwill	2	(1)
Ending balance	$ 24	$ 22

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details