Debt (Narrative) (Details) - USD ($)										12 Months Ended
		Apr. 15, 2020	Apr. 07, 2020	Nov. 05, 2019	Feb. 27, 2018	Feb. 13, 2018	Jul. 28, 2017	Feb. 28, 2017	Sep. 24, 2015	Dec. 31, 2021	Dec. 25, 2020	Dec. 27, 2019	Dec. 29, 2017	Apr. 15, 2015	Aug. 31, 2014	Apr. 30, 2013
Debt Instrument [Line Items]
Write off of Deferred Debt Issuance Cost												$ 4,900,000
Long-term Debt, Gross										$ 0	$ 0
Exchange of Debt, Amount			$ 495,000,000									322,900,000
Extinguishment of Debt, Amount												383,200,000
Debt Issuance Costs, Net	[1]									6,100,000	34,700,000
Gains on debt extinguishment, net										0	0	466,600,000
Repayments of Debt										137,500,000	139,500,000	945,100,000
Debtor Reorganization Items, Write-off of Debt Issuance Costs and Debt Discounts										23,100,000	10,200,000
2023 Notes
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage									100.00%
Receivable securitization, Maturity Date of July 2020 [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt												200,000,000
Four Point Eight Eight Percent Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 1,000
Repayments of Debt		$ 119,800,000
Ten Point Zero Percent First Lien Notes [Member]
Debt Instrument [Line Items]
Stated interest rate			10.00%
Existing Notes (December Exchange) [Member]
Debt Instrument [Line Items]
Gains on debt extinguishment, net												377,400,000
Debentures
Debt Instrument [Line Items]
Debt Issuance Costs, Net	[1]									0	0
Debentures | 4.75% senior notes due April 2023
Debt Instrument [Line Items]
Debt Issuance Costs, Net	[1]									$ 0	0
Debentures | Five Point Six Two Five Percent Note
Debt Instrument [Line Items]
Stated interest rate										5.625%
Extinguishment of Debt, Amount				$ 144,700,000
Debt Issuance Costs, Net	[1]									$ 0	0
Debentures | Five Point Five Percent Notes [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount				208,900,000
Debt Issuance Costs, Net	[1]									$ 0	0
Debentures | 2017 Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 900,000,000
Variable interest rate								2.25%
Debt Instrument, Interest Rate, Effective Percentage	[2]									4.42%
Debentures | 5.75% senior notes due August 2022
Debt Instrument [Line Items]
Debt Issuance Costs, Net	[1]									$ 0	0
Debentures | 2020 Notes
Debt Instrument [Line Items]
Debt instrument, face amount														$ 700,000,000
Stated interest rate														4.875%
Debentures | 2025 Notes
Debt Instrument [Line Items]
Debt instrument, face amount														$ 700,000,000
Stated interest rate														5.50%
Debentures | 2023 Notes
Debt Instrument [Line Items]
Debt instrument, face amount									$ 750,000,000
Stated interest rate									5.625%
Debentures | Four Point Eight Eight Percent Notes [Member]
Debt Instrument [Line Items]
Exchange of Debt, Amount				83,200,000
Senior Notes | 4.75% senior notes due April 2023
Debt Instrument [Line Items]
Debt instrument, face amount																$ 600,000,000
Stated interest rate										4.75%						4.75%
Extinguishment of Debt, Amount				216,400,000
Senior Notes | Five Point Five Percent Notes [Member]
Debt Instrument [Line Items]
Stated interest rate										5.50%
Senior Notes | 5.75% senior notes due August 2022
Debt Instrument [Line Items]
Debt instrument, face amount															$ 900,000,000
Stated interest rate										5.75%					5.75%
Extinguishment of Debt, Amount				$ 52,900,000
Senior Notes | Ten Point Zero Percent Second Lien Notes [Member]
Debt Instrument [Line Items]
Stated interest rate										10.00%
Secured Debt
Debt Instrument [Line Items]
Debt Issuance Costs, Net	[1]									$ 6,100,000	34,700,000
Secured Debt | 2017 Revolving Credit Facility
Debt Instrument [Line Items]
Debt Issuance Costs, Net	[1]									$ 200,000	1,700,000
Secured Debt | Term Loan due Sept 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	[2]									6.00%
Debt Issuance Costs, Net	[1]									$ 0	12,300,000
Secured Debt | Term Loan and New Term Loan
Debt Instrument [Line Items]
Variable interest rate								2.75%
Quarterly amortization payments								0.25%
Long-term Debt, Gross								$ 1,865,000,000
Secured Debt | Receivable securitization, Maturity Date of July 2020 [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 250,000,000
Variable interest rate							0.90%
Secured Debt | Term Loan due 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	[2]									6.25%
Debt Issuance Costs, Net	[1]									$ 0	5,000,000.0
Secured Debt | Ten Point Zero Percent First Lien Notes [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Net	[1]									5,900,000	7,700,000
Secured Debt | Ten Point Zero Percent Second Lien Notes [Member]
Debt Instrument [Line Items]
Stated interest rate				10.00%
Debt Issuance Costs, Net	[1]									$ 0	$ 8,000,000.0
Debt Issuance Costs, Gross												$ 10,100,000
2017 Revolving Credit Facility | Term loan due March 2021
Debt Instrument [Line Items]
Facility fees for letters of credit										0.275%
Option A | 5.75% senior notes due August 2022
Debt Instrument [Line Items]
Repurchase percentage													101.00%
Option A | 2023 Notes
Debt Instrument [Line Items]
Repurchase percentage									101.00%
Option A | Ten Point Zero Percent Second Lien Notes [Member]
Debt Instrument [Line Items]
Repurchase percentage				101.00%
Option B | 5.75% senior notes due August 2022
Debt Instrument [Line Items]
Repurchase percentage													100.00%
Option B | 2023 Notes
Debt Instrument [Line Items]
Repurchase percentage									100.00%
Option B | Ten Point Zero Percent Second Lien Notes [Member]
Debt Instrument [Line Items]
Repurchase percentage				100.00%
Letter of Credit | 2017 Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 50,000,000
Sucampo [Member] | Secured Debt | Term Loan due 2025 [Member]
Debt Instrument [Line Items]
Variable interest rate						3.00%
Quarterly amortization payments					0.25%
Loans Payable						$ 600,000,000
Ten Point Zero Percent First Lien Notes [Member] | Four Point Eight Eight Percent Notes [Member]
Debt Instrument [Line Items]
Debt Conversion, Converted Instrument, Amount			$ 1,000
Existing Notes (December Exchange) [Member] | Secured Debt | Ten Point Zero Percent Second Lien Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 252,700,000
Five Point Five Percent Notes [Member] | Secured Debt | Ten Point Zero Percent Second Lien Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 70,200,000

[1] As a result of the Company's Chapter 11 Cases, the Company expensed $23.1 million and $10.2 million of unamortized discount and debt issuance costs, net, recorded in reorganization items, net in the consolidated statements of operations for fiscal 2021 and 2020, respectively.

[2] Includes the incremental 200 basis points and 250 basis points related to the cash adequate protection payments for the revolving credit facility and senior secured term loans, respectively. Refer to Note 2 for further information