Business Segments - Business Segment Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Segment Reporting Information [Line Items]
Revenue	$ 2,684.8	$ 2,414.9	$ 1,791.1
Operating profit (loss)	(208.4)	155.7	(137.1)
Interest Expense	(47.3)	(37.4)	(43.6)
Debt extinguishment and other costs	0.0	34.3	5.5
Other Nonoperating Income (Expense)	2.8	(3.7)	2.1
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(252.9)	80.3	(184.1)
Depreciation and amortization expense	34.6	33.2	32.8
Capital expenditures	36.5	17.6	10.3
Total assets	2,492.7	2,586.4
Goodwill	485.0	556.6	442.4
Active Group
Segment Reporting Information [Line Items]
Revenue	1,570.2	1,319.6	909.3
Operating profit (loss)	198.4	229.5	164.1
Depreciation and amortization expense	8.1	5.4	2.7
Capital expenditures	18.9	5.0	1.4
Total assets	1,331.5	1,377.3
Goodwill	314.4	380.3
Work Group
Segment Reporting Information [Line Items]
Revenue	590.5	548.8	425.4
Operating profit (loss)	102.5	103.8	65.2
Depreciation and amortization expense	0.3	0.3	0.4
Capital expenditures	0.4	0.4	0.0
Total assets	375.7	284.2
Goodwill	59.6	61.3
Lifestyle Group
Segment Reporting Information [Line Items]
Revenue	447.5	477.0	407.0
Operating profit (loss)	48.1	67.5	34.2
Depreciation and amortization expense	2.0	2.3	3.0
Capital expenditures	2.0	0.1	1.7
Total assets	514.8	663.4
Goodwill	97.4	101.3
Other Segments [Member]
Segment Reporting Information [Line Items]
Revenue	76.6	69.5	49.4
Operating profit (loss)	11.8	8.1	6.1
Depreciation and amortization expense	1.4	1.6	2.0
Capital expenditures	3.2	1.7	0.9
Total assets	58.6	57.8
Goodwill	13.6	13.7
Corporate [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	(569.2)	(253.2)	(406.7)
Depreciation and amortization expense	22.8	23.6	24.7
Capital expenditures	12.0	10.4	$ 6.3
Total assets	$ 212.1	$ 203.7