Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019
Restricted Cash and Investments, Current	$ 24.0	$ 20.2	$ 0.0
Restricted Cash and Investments, Noncurrent	36.2	36.2	31.7
Cash and cash equivalents	1,345.0	1,070.6	790.9
Cash and Cash Equivalents, Including Restricted Cash	1,405.2	1,127.0	822.6
Effect of currency rate changes on cash	(1.9)	2.3	0.6
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	278.2	304.4	455.1
Cash Flows from Operating Activities:
Net loss	(717.4)	(944.6)	(996.5)
Adjustments to reconcile net cash provided by operating activities:
Depreciation and amortization	675.8	885.2	951.1
Share-based compensation	10.2	25.3	33.8
Deferred income taxes	(59.9)	385.3	(604.3)
Non-cash impairment charges	154.9	63.5	388.0
Inventory provisions	11.5	18.5	18.0
Losses (gains) on divestiture	0.8	16.6	33.5
Gain on debt extinguishment, net	0.0	0.0	(466.6)
Other non-cash items	(13.1)	(40.2)	(65.7)
Reorganization items, net	22.5	10.2	0.0
Changes in assets and liabilities, net of the effects of acquisitions:
Accounts receivable, net	98.2	(37.9)	31.6
Inventories	(14.0)	51.1	(23.1)
Accounts payable	(1.1)	15.7	6.7
Income taxes	108.5	(433.8)	(2.1)
Opioid-related litigation settlement liability	125.0	0.0	1,600.0
Medicaid lawsuit	(4.2)	638.9	0.0
Other	57.7	95.3	(161.5)
Net cash from operating activities	455.4	498.9	742.9
Cash Flows from Investing Activities:
Capital expenditures	(55.3)	(47.7)	(133.0)
Proceeds (payments) related to divestiture, net of cash	15.7	(0.7)	95.1
Other	1.8	(37.2)	29.6
Net cash from investing activities	(37.8)	(11.2)	(8.3)
Cash Flows from Financing Activities:
Issuance of external debt	0.0	0.0	695.0
Repayment of external debt	(137.5)	(139.5)	(945.1)
Debt financing costs	0.0	(9.4)	(10.1)
Proceeds from exercise of share options	0.0	0.0	0.6
Repurchase of shares	0.0	(0.4)	(2.6)
Other	0.0	(36.3)	(17.9)
Net Cash Provided by (Used in) Financing Activities	(137.5)	(185.6)	(280.1)
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	243.2	256.1	314.2
Cash (received) paid for income taxes, net	$ (160.0)	$ 39.9	$ 30.7