Consolidated Statement of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021
Cash flows from operating activities
Net earnings (loss)	$ (1,487,800,000)	$ 203,000,000.0	$ 435,300,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of property, plant and equipment	127,700,000	127,300,000	163,300,000
Loss on disposal of business	539,000,000.0	22,100,000	108,800,000
Impairment of goodwill	1,191,200,000	0	0
Impairment of intangibles and production assets	116,000,000.0	281,000,000.0	0
Loss on Discovery investment	0	0	74,100,000
Fair value adjustment on Discovery Option	0	0	(20,100,000)
Inventory obsolescence	91,200,000	45,200,000	8,400,000
Amortization of intangible assets	83,000,000.0	105,300,000	116,800,000
Program cost amortization	448,900,000	555,500,000	628,600,000
Deferred income taxes	(243,500,000)	(130,100,000)	36,000,000.0
Stock-based compensation	72,400,000	83,400,000	97,800,000
Other non-cash items	(6,100,000)	3,200,000	(1,500,000)
Changes in operating assets and liabilities, net of acquired and disposed balances:
Decrease (increase) in accounts receivable	15,500,000	339,600,000	(159,500,000)
Decrease (increase) in inventories	257,100,000	(184,700,000)	(182,300,000)
Decrease (increase) in prepaid expenses and other current assets	34,700,000	17,000,000.0	(30,600,000)
Program spend, net	(408,000,000.0)	(767,700,000)	(697,300,000)
(Decrease) increase in accounts payable and accrued liabilities	(109,700,000)	(278,700,000)	313,200,000
Change in net deemed repatriation tax	(34,400,000)	(18,400,000)	(18,400,000)
Other	38,400,000	(30,100,000)	(54,700,000)
Net cash provided by operating activities	725,600,000	372,900,000	817,900,000
Cash flows from investing activities
Additions to property, plant and equipment	(209,300,000)	(174,200,000)	(132,700,000)
Investments and acquisitions, net of cash acquired	0	(146,300,000)	0
Proceeds from sale of business, net of cash transferred	329,600,000	0	378,500,000
Other	(2,700,000)	7,500,000	(3,800,000)
Net cash provided (utilized) by investing activities	117,600,000	(313,000,000.0)	242,000,000.0
Cash flows from financing activities
Proceeds from borrowings	2,600,000	3,800,000	144,000,000.0
Repayments of borrowings	(359,600,000)	(206,000,000.0)	(1,220,100,000)
Net (repayments) proceeds of other short-term borrowings	(41,600,000)	141,700,000	(5,600,000)
Purchases of common stock	0	(125,000,000.0)	0
Stock-based compensation transactions	0	74,200,000	30,600,000
Dividends paid	(388,000,000.0)	(385,300,000)	(374,500,000)
Payments related to tax withholding for share-based compensation	(16,800,000)	(24,000,000.0)	(13,700,000)
Debt extinguishment costs	0	0	(9,100,000)
Other	(14,700,000)	(32,700,000)	(11,400,000)
Net cash utilized by financing activities	(818,100,000)	(553,300,000)	(1,459,800,000)
Effect of exchange rate changes on cash	7,200,000	(12,700,000)	(30,600,000)
Increase (decrease) in cash, cash equivalents and restricted cash	32,300,000	(506,100,000)	(430,500,000)
Cash, cash equivalents and restricted cash at beginning of year	513,100,000	1,019,200,000	1,449,700,000
Cash, cash equivalents and restricted cash at end of year	545,400,000	513,100,000	1,019,200,000
Supplemental information
Interest paid	179,000,000.0	161,700,000	171,900,000
Income taxes paid	$ 119,800,000	$ 177,200,000	$ 160,500,000