Derivative Instruments and Hedging Activities - Additional Information (Details)				3 Months Ended		9 Months Ended
		Mar. 07, 2016 USD ($)	Apr. 08, 2015 USD ($)	Oct. 01, 2016 USD ($)	Sep. 26, 2015 USD ($)	Oct. 01, 2016 USD ($)	Sep. 26, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jun. 25, 2015 USD ($)	Mar. 30, 2015 USD ($)	Mar. 30, 2015 EUR (€)	Dec. 05, 2014 USD ($)
Derivative [Line Items]
Proceeds from issuance of debt		$ 1,200,000,000
Gain (loss) on derivatives						$ (7,000,000)
Payments on long-term debt						545,800,000	$ 903,300,000
Term loans	[1]											$ 300,000,000
Loss on derivatives						0	300,000,000
Non-designated derivatives
Derivative [Line Items]
Gain (loss) on derivatives				$ (1,200,000)	$ (8,800,000)	$ (10,200,000)	(262,800,000)
Interest rate swap agreements | Designated derivatives
Derivative [Line Items]
Derivative notional amount								$ 200,000,000	$ 240,000,000
Foreign currency forward contracts
Derivative [Line Items]
Maximum remaining maturity of foreign currency derivatives						15 months
Foreign exchange contract
Derivative [Line Items]
Derivative notional amount				482,500,000		$ 482,500,000		$ 755,500,000
Foreign exchange option | Designated derivatives
Derivative [Line Items]
Gain (loss) on derivatives							(1,900,000)
Omega | Interest rate swap agreements | Designated derivatives
Derivative [Line Items]
Derivative notional amount										$ 147,000,000
Gain (loss) on derivatives			$ 0
Credit facility indebtedness | Omega
Derivative [Line Items]
Long-term debt assumed										544,500,000
Euro | Interest rate swap agreements | Designated derivatives
Derivative [Line Items]
Derivative notional amount | €											€ 135,000,000
Euro | Credit facility indebtedness | Omega
Derivative [Line Items]
Long-term debt assumed | €											€ 500,000,000
Omega | Interest rate swap agreements | Designated derivatives
Derivative [Line Items]
Derivative notional amount										20,000,000
Perrigo Co PLC | Foreign exchange option | Non-designated derivatives
Derivative [Line Items]
Gain (loss) on derivatives							(259,800,000)
Other expense, net
Derivative [Line Items]
Loss on derivatives							3,600,000
Interest expense, net | Foreign currency forward contracts | Non-designated derivatives
Derivative [Line Items]
Gain (loss) on derivatives				(1,000,000)	100,000	(1,500,000)	(3,400,000)
Other expense, net | Foreign currency forward contracts | Non-designated derivatives
Derivative [Line Items]
Gain (loss) on derivatives				$ (200,000)	$ (8,900,000)	$ (8,700,000)	(259,400,000)
6.19% senior notes | Omega | Omega
Derivative [Line Items]
Long-term debt assumed										$ 20,000,000.0
2014 Term Loan Maturing December 18, 2015
Derivative [Line Items]
Payments on long-term debt							$ 300,000,000

[1] Debt denominated in euros subject to fluctuations in the euro-to-U.S. dollar exchange rate.