Income Taxes (Schedule of Deferred Taxes Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2024	Dec. 29, 2023	Nov. 14, 2023	Dec. 30, 2022	Jun. 16, 2022	Dec. 31, 2021
Deferred tax assets:
Tax loss and credit carryforward	$ 3,529.8	$ 3,600.7
Deferred Tax Assets, Capital Loss Carryforwards	188.1	983.5
Deferred Tax Assets, Goodwill and Intangible Assets	474.8	571.5
Other	306.9	326.4
Total deferred tax assets, gross	4,499.6	5,482.1
Deferred tax liabilities:
Investment in partnership	66.1	68.7
Deferred Tax Liabilities, Other	24.5	28.6
Total deferred tax liabilities, gross	(90.6)	(97.3)
Net deferred tax asset before valuation allowances	4,409.0	5,384.8
Valuation allowances	(3,757.3)	(4,583.8)	$ (4,584.8)	$ (4,992.9)	$ (5,129.7)	$ (6,344.2)
Deferred income tax asset (liability), net	651.7	$ 801.0
Increase (Decrease) Deferred Tax Assets, Capital Tax Loss Carryforwards	795.5
Increase (Decrease) Deferred Tax Assets, Other	$ 76.1