Condensed Consolidated Balance Sheets $ in Millions	Sep. 30, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares
Medicaid lawsuit liability	$ 16.5	$ 0.0
Opioid-Related Litigation Settlement liability, Current	200.0	0.0
Opioid-Related Litigation Settlement liability	342.8	0.0
Acthar Gel-Related Settlement, Non-current	69.2	0.0
Treasury Stock, Value	$ 0.0	$ 1,616.1
Preferred shares, par value (in usd per share) | $ / shares		$ 0.20
Preferred shares, shares authorized (in shares) | shares		500,000,000
Preferred shares, shares issued (in shares) | shares		0
Preferred shares, shares outstanding (in shares) | shares	0	0
Deferred Tax Assets, Net	$ 464.2	$ 0.0
Ordinary shares, shares issued (in shares) | shares	0
Ordinary shares, shares authorized (in shares) | shares		500,000,000
Common Stock, Shares, Outstanding | shares	0
Ordinary shares, par value (in usd per share) | $ / shares		$ 0.20
Cash and cash equivalents	$ 391.2	$ 1,345.0
Accounts receivable, less allowance for doubtful accounts of $6.0 and $4.7	377.0	439.1
Inventories	1,071.6	347.2
Prepaid expenses and other current assets	321.4	178.3
Assets Held-for-sale, Not Part of Disposal Group, Current	7.2	0.0
Assets, Current	2,168.4	2,309.6
Property, plant and equipment, net	448.3	776.0
Intangible assets, net	2,980.4	5,448.4
Other assets	196.1	382.3
Assets	6,257.4	8,916.3
Current maturities of long-term debt	44.1	1,388.9
Accounts payable	89.1	123.0
Accrued payroll and payroll-related costs	40.7	84.6
Accrued interest	71.1	17.0
Accrued and other current liabilities	317.6	328.7
Liabilities, Current	779.1	1,942.2
Long-term debt	3,034.3	0.0
Pension and postretirement benefits	53.6	30.1
Environmental liabilities	36.4	43.0
Deferred Tax Liabilities, Gross	1.5	20.9
Other income tax liabilities	14.4	83.2
Other liabilities	77.0	85.8
Liabilities subject to compromise	0.0	6,397.7
Liabilities	4,408.3	8,602.9
Predecessor ordinary shares, $0.20 par value, 500,000,000 authorized; 94,296,235 issued; 84,726,590 outstanding	2,204.0	5,597.8
Predecessor ordinary shares held in treasury at cost, none and 9,569,645	(6.4)	(8.3)
Retained deficit	(348.6)	(3,678.9)
Stockholders' Equity Attributable to Parent	1,849.1	313.4
Liabilities and Equity	6,257.4	8,916.3
Current Assets:
Cash and cash equivalents	391.2	1,345.0
Accounts receivable, less allowance for doubtful accounts of $6.0 and $4.7	377.0	439.1
Inventories	1,071.6	347.2
Prepaid expenses and other current assets	321.4	178.3
Total current assets	2,168.4	2,309.6
Property, plant and equipment, net	448.3	776.0
Intangible assets, net	2,980.4	5,448.4
Other assets	196.1	382.3
Total Assets	6,257.4	8,916.3
Current Liabilities:
Current maturities of long-term debt	44.1	1,388.9
Accounts payable	89.1	123.0
Accrued payroll and payroll-related costs	40.7	84.6
Accrued interest	71.1	17.0
Accrued and other current liabilities	317.6	328.7
Total current liabilities	779.1	1,942.2
Pension and postretirement benefits	53.6	30.1
Environmental liabilities	36.4	43.0
Deferred Tax Liabilities, Gross	1.5	20.9
Other income tax liabilities	14.4	83.2
Other liabilities	77.0	85.8
Liabilities subject to compromise	0.0	6,397.7
Total Liabilities and Shareholders' Equity	6,257.4	8,916.3
Other liabilities	$ 4,408.3	$ 8,602.9
Shareholders' Equity:
Preferred shares, shares outstanding (in shares) | shares	0	0
Ordinary shares held in treasury at cost	$ 0.0	$ (1,616.1)
Predecessor ordinary shares, $0.20 par value, 500,000,000 authorized; 94,296,235 issued; 84,726,590 outstanding	2,204.0	5,597.8
Retained deficit	(348.6)	(3,678.9)
Predecessor ordinary shares held in treasury at cost, none and 9,569,645	(6.4)	(8.3)
Total Shareholders' Equity	1,849.1	313.4
Predecessor
Preferred shares	0.0	0.0
Ordinary A shares	0.0	0.0
Ordinary shares	$ 0.0	$ 18.9
Preferred shares, par value (in usd per share) | $ / shares	$ 0.20
Preferred shares, shares authorized (in shares) | shares	500,000,000
Preferred shares, shares issued (in shares) | shares		0
Preferred shares, shares outstanding (in shares) | shares	0
Ordinary shares, shares issued (in shares) | shares		94,296,235
Ordinary shares, shares authorized (in shares) | shares		500,000,000
Common Stock, Shares, Outstanding | shares		84,726,590
Ordinary shares, par value (in usd per share) | $ / shares		$ 0.20
Shareholders' Equity:
Preferred shares	$ 0.0	$ 0.0
Preferred shares, shares outstanding (in shares) | shares	0
Ordinary A shares	$ 0.0	0.0
Ordinary shares	0.0	18.9
Successor
Preferred shares	0.0	0.0
Ordinary A shares	0.0	0.0
Ordinary shares	$ 0.1	$ 0.0
Preferred shares, par value (in usd per share) | $ / shares	$ 0.01
Preferred shares, shares authorized (in shares) | shares	500,000,000
Preferred shares, shares issued (in shares) | shares	0
Preferred shares, shares outstanding (in shares) | shares		0
Ordinary shares, shares authorized (in shares) | shares	500,000,000
Ordinary shares, par value (in usd per share) | $ / shares	$ 0.01
Shareholders' Equity:
Preferred shares	$ 0.0	$ 0.0
Preferred shares, shares outstanding (in shares) | shares		0
Ordinary A shares	0.0	$ 0.0
Ordinary shares	$ 0.1	$ 0.0
Ordinary A
Ordinary shares, shares issued (in shares) | shares		0.00
Ordinary shares, shares authorized (in shares) | shares	40,000
Shareholders' Equity:
Ordinary A shares, shares outstanding (in shares) | shares	0	0