Income Taxes (Details) € in Millions, $ in Millions							3 Months Ended		12 Months Ended
	May 03, 2021	Feb. 26, 2021 USD ($)	Jan. 13, 2021 USD ($)	Dec. 19, 2020 USD ($)	May 07, 2020 USD ($)	Aug. 15, 2017 USD ($)	Apr. 03, 2021 USD ($)	Mar. 28, 2020	Dec. 31, 2020 USD ($)	Dec. 31, 2013	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 29, 2020 USD ($)	Apr. 26, 2019 USD ($)	Nov. 29, 2018 EUR (€)
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation, percent							84.00%	(0.40%)
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
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, estimate of additional tax expense, excluding interest and penalties		$ 18.0							$ 7.0
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
IRS notice of proposed audit adjustment, increase to gross sales revenue for the 2013, 2014 and 2015 tax years				$ 99.5
IRS notice of proposed adjustment amount from 2011,2012 and 2013 audit of Athena, including penalty																$ 843.0
IRS notice of proposed adjustment, penalty (percent)																40.00%
Subsequent Event
Income Tax Contingency [Line Items]
Interest rate cap on debts for U.S. Federal tax purposes, as percent of Applicable Federal Rate, no longer pursued	130.00%
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
Revenue Commissioners, Ireland
Income Tax Contingency [Line Items]
Irish Revenue notice of amended assessment unsettled assessed audit liability | €																	€ 1,643
Irish Revenue proposed tax rate on net chargeable gain realized (percent)										33.00%
Irish Revenue tax rate applied to trading income (percent)										12.50%
Unsettled audit assessment from income tax examination | €																	€ 1,636
Israel Tax Authority
Income Tax Contingency [Line Items]
Unsettled audit assessment from income tax examination															$ 63.8