Income Taxes (Details) € in Millions, $ in Millions								3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 09, 2021 USD ($)	May 03, 2021	Feb. 26, 2021 USD ($)	Jan. 13, 2021 USD ($)	Dec. 19, 2020 USD ($)	May 07, 2020 USD ($)	Aug. 15, 2017 USD ($)	Jul. 03, 2021 USD ($)	Jun. 27, 2020	Jul. 03, 2021 USD ($) year	Jun. 27, 2020	Dec. 31, 2020 USD ($)	Dec. 31, 2013	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Jul. 09, 2021 EUR (€)	Dec. 29, 2020 USD ($)	Apr. 26, 2019 USD ($)	Nov. 29, 2018 EUR (€)
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation, percent								28.80%	19.70%	22.10%	3.90%
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
Interest rate cap on debts for U.S. Federal tax purposes, as percent of Applicable Federal Rate, no longer pursued		130.00%
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%
Tax Years 2013 - 2015
Income Tax Contingency [Line Items]
Income tax examination, estimate of additional tax expense, excluding interest and penalties			$ 18.0
Tax Year 2020
Income Tax Contingency [Line Items]
Income tax examination, estimate of additional tax expense, excluding interest and penalties												$ 7.0
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Income tax examination, number of taxable years | year										4
Revenue Commissioners, Ireland
Income Tax Contingency [Line Items]
Irish Revenue notice of amended assessment unsettled assessed audit liability | €																					€ 1,643.0
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 | €																					€ 1,636.0
Revenue Commissioners, Ireland | Subsequent Event
Income Tax Contingency [Line Items]
Income tax examination, estimate of additional tax expense, excluding interest and penalties	$ 1,000.0
Irish Revenue, potential reduction in tax assessment | €																		€ 660.0
Israel Tax Authority
Income Tax Contingency [Line Items]
Income tax examination, number of taxable years | year										5
Unsettled audit assessment from income tax examination																			$ 63.8
Income tax examination, taxes paid										$ 19.0
Income tax examination, offset for tax refunds										17.2
Payment to resolve tax liability indemnity										12.5
Reduction in liability recorded for uncertain tax positions								$ 38.3		$ 38.3
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