Income Taxes (Details) $ in Millions						3 Months Ended		9 Months Ended		12 Months Ended
	May 05, 2023 USD ($)	Jan. 20, 2022	Jan. 13, 2021 USD ($)	May 07, 2020 USD ($)	Aug. 15, 2017 USD ($)	Sep. 30, 2023 USD ($)	Oct. 01, 2022	Sep. 30, 2023 USD ($) year	Oct. 01, 2022	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Apr. 26, 2019 USD ($)
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation, percent						19.70%	(1377.10%)	49.50%	5.30%
Income tax examination, penalties and interest expense					$ 134.1					$ 24.7	$ 40.1	$ 41.8	$ 27.5
Cumulative deferred charge related to tax litigation						$ 111.6		$ 111.6
Royalty conceded on all omeprazole sales as a percent of refund claims (percent)								5.24%
IRS Notice of Proposed Audit Adjustment from 2013, 2014 and 2015			$ 141.6
IRS Notice of Proposed Audit Adjustment for ANDA from 2013, 2014 and 2015			21.9
Income tax examination, debts subject to limit of deductibility of interest expense			7,500.0
Interest rate cap on debts for U.S. Federal tax purposes, as percent of Applicable Federal Rate				130.00%
Income tax examination, reduction in blended interest rate due to cap for U.S. Federal tax purposes				4.00%
IRS notice of proposed audit adjustment to reduce deductible interest expense for fiscal years 2014 and 2015				$ 414.7
Blended interest rate proposed on debts	5.44%	4.36%
Blended interest rate in revenue agent report		2.57%
Stated blended interest rate		6.80%
Income tax examination, interest expense	$ 153.4
IRS notice of proposed adjustment amount from 2011,2012 and 2013 audit of Athena, including penalty														$ 843.0
IRS notice of proposed adjustment, royalty rate (percent)														0.247
IRS notice of proposed adjustment, penalty (percent)														40.00%
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Income tax examination, number of taxable years | year								4
Minimum
Income Tax Contingency [Line Items]
Income tax examination, estimate of additional tax expense, excluding interest and penalties			24.0
Maximum
Income Tax Contingency [Line Items]
Income tax examination, estimate of additional tax expense, excluding interest and penalties			$ 112.0