Additional Balance Sheet Information - Components of Accrued liabilities (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Dec. 29, 2024	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023	Dec. 31, 2023
Payables and Accruals [Abstract]
Royalties		$ 335.4	$ 148.9	$ 335.4	$ 148.9	$ 286.8
Deferred revenue		103.2	112.1	103.2	112.1	101.6
Lag & cancellation charges		51.2	83.0	51.2	83.0	118.9
Dividends		0.0	97.1	0.0	97.1	97.2
Severance		51.0	55.5	51.0	55.5	83.7
Accrued income taxes		99.3	27.3	99.3	27.3	61.6
Other taxes		60.5	63.8	60.5	63.8	68.7
Interest		49.5	38.1	49.5	38.1	29.9
General vendor accruals		57.8	57.9	57.8	57.9	51.9
Participations and residuals		18.3	30.4	18.3	30.4	34.0
Advertising		70.0	52.3	70.0	52.3	45.0
Lease liability - current		$ 32.2	$ 28.1	$ 32.2	$ 28.1	$ 30.5
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Total accrued liabilities	Total accrued liabilities	Total accrued liabilities	Total accrued liabilities	Total accrued liabilities
Payroll and management incentives		$ 79.8	$ 63.8	$ 79.8	$ 63.8	$ 85.6
Defined contribution plans		16.0	27.3	16.0	27.3	29.7
Freight		34.7	32.3	34.7	32.3	22.9
Insurance		12.3	12.2	12.3	12.2	13.3
Professional fees		18.6	16.0	18.6	16.0	12.4
Accrued expenses - IIP & IIC		0.5	2.7	0.5	2.7	0.7
Other		42.2	36.6	42.2	36.6	41.4
Total accrued liabilities		$ 1,132.5	$ 985.4	$ 1,132.5	$ 985.4	$ 1,215.8
Other Assets [Line Items]
Cash dividends declared per common share (in dollars per share)		$ 0.70	$ 0.70	$ 1.40	$ 2.10
Forecast
Other Assets [Line Items]
Cash dividends declared per common share (in dollars per share)	$ 0.70