Liabilities Subject to Compromise (Details) - USD ($) $ in Millions	Apr. 01, 2022	Dec. 31, 2021
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	$ 6,433.2	$ 6,397.7
Accounts Payable
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	43.4	42.9
Interest Payable, Current
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	35.2	35.2
Long-term Debt
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	3,746.2	3,750.8
Medicaid Lawsuit [Member]
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	634.7	634.7
Opioid-related litigation settlement liability
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	1,725.0	1,725.0
Other current and non-current liabilities
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	149.6	125.1
Liability, Defined Benefit Plan, Noncurrent
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	32.2	32.0
Accrued Environmental Loss Contingencies
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise (Note 2)	$ 66.9	$ 52.0