Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Aug. 25, 2024	Aug. 31, 2025	Aug. 25, 2024	Dec. 01, 2024	Nov. 26, 2023
Goodwill [Line Items]
Goodwill	$ 409.6	$ 410.1	$ 409.6	$ 406.4	$ 390.7
Accumulated impairment losses	(128.8)	(131.3)	(128.8)	(128.8)	(87.0)
Goodwill, net	280.8	278.8	280.8	277.6	303.7
Goodwill [Roll Forward]
Beginning balance		277.6	303.7
Impairment losses		(2.5)	(41.8)
Goodwill, acquired during the year		0.0	20.9
Foreign currency fluctuation		3.7	(2.0)
Ending balance	280.8	278.8	280.8
Beyond Yoga
Goodwill [Roll Forward]
Impairment losses	(36.3)		(36.3)
Americas
Goodwill [Line Items]
Goodwill	244.9	244.4	244.9	242.7	231.7
Accumulated impairment losses	0.0	(2.5)	0.0	0.0	0.0
Goodwill, net	244.9	241.9	244.9	242.7	231.7
Goodwill [Roll Forward]
Beginning balance		242.7	231.7
Impairment losses		(2.5)	0.0
Goodwill, acquired during the year		0.0	15.9
Foreign currency fluctuation		1.7	(2.7)
Ending balance	244.9	241.9	244.9
Americas | Expofaro S.A.S
Goodwill [Roll Forward]
Goodwill, acquired during the year			15.9
Europe
Goodwill [Line Items]
Goodwill	38.2	39.2	38.2	37.2	32.6
Accumulated impairment losses	(17.1)	(17.1)	(17.1)	(17.1)	(11.6)
Goodwill, net	21.1	22.1	21.1	20.1	21.0
Goodwill [Roll Forward]
Beginning balance		20.1	21.0
Impairment losses		0.0	(5.5)
Goodwill, acquired during the year		0.0	5.0
Foreign currency fluctuation		2.0	0.6
Ending balance	21.1	22.1	21.1
Asia
Goodwill [Line Items]
Goodwill	2.9	2.9	2.9	2.9	2.8
Accumulated impairment losses	0.0	0.0	0.0	0.0	0.0
Goodwill, net	2.9	2.9	2.9	2.9	2.8
Goodwill [Roll Forward]
Beginning balance		2.9	2.8
Impairment losses		0.0	0.0
Goodwill, acquired during the year		0.0	0.0
Foreign currency fluctuation		0.0	0.1
Ending balance	2.9	2.9	2.9
Beyond Yoga®
Goodwill [Line Items]
Goodwill	123.6	123.6	123.6	123.6	123.6
Accumulated impairment losses	(111.7)	(111.7)	(111.7)	(111.7)	(75.4)
Goodwill, net	11.9	11.9	11.9	$ 11.9	$ 48.2
Goodwill [Roll Forward]
Beginning balance		11.9	48.2
Impairment losses		0.0	(36.3)
Goodwill, acquired during the year		0.0	0.0
Foreign currency fluctuation		0.0	0.0
Ending balance	$ 11.9	$ 11.9	$ 11.9