Income Taxes (Details) $ in Millions	3 Months Ended			6 Months Ended
	Mar. 25, 2016 USD ($)	Dec. 25, 2015 USD ($)	Mar. 27, 2015 USD ($)	Mar. 25, 2016 USD ($)	Mar. 27, 2015 USD ($)	Sep. 25, 2015 USD ($)
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	$ 26.1			$ 26.1
Income tax benefit	(53.6)		$ (34.1)	(85.7)	$ (44.4)
Income (loss) from continuing operations before income taxes	$ 66.7		$ 41.1	$ 150.5	$ 118.2
Effective tax rate	(80.40%)		(83.00%)	(56.90%)	(37.60%)
Discontinued operation, income tax (benefit) expense	$ (0.2)			$ (2.9)
Deferred Tax Assets, Valuation Allowance	29.5			29.5
Unrecognized tax benefits	94.5			94.5		$ 89.2
Unrecognized tax benefits, net increase				5.3
Unrecognized tax benefits, net decreases related to prior period tax positions				1.9
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations				0.9
Unrecognized tax benefits, additions related to current year tax positions				10.0
Unrecognized tax benefits, decrease related to settlements				1.9
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	92.7			92.7
Interest accrued on unrecognized tax benefits	37.4			37.4		$ 41.7
Unrecognized tax benefits that would impact effective tax rate, upper bound of change	37.6			37.6
Income tax penalties and interest accrued that would impact effective tax rate, upper bound of change	$ 29.6			$ 29.6
Increase (Decrease) in Effective Tax Rate, Percentage Point	2.6
Effective Income Tax Rate Reconciliation, Diminutive Income, Percentage Point	17.1
Effective Income Tax Rate Reconciliation, Recent Acquisitions, Percentage Point	(14.5)			(19.3)
Effective Income Tax Rate Reconciliation, Change in Operating Income, Percentage Point	(9.5)			(12.8)
Effective Income Tax Rate Reconciliation, Other, Percentage Point	(5.0)			(6.5)
Ikaria, Inc.
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Intangible Assets		$ (537.6)
Increase in deferred tax liability, net due to installment sale note receivable		521.9
Increase (Decrease) in Income Taxes		42.8
Increase in deferred tax charge, due to installment sale		26.0
Increase in prepaid taxes, due to installment sale		1.1
Therakos
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Intangible Assets		(268.5)
Increase in deferred tax liability, net due to installment sale note receivable		251.5
Increase (Decrease) in Income Taxes		17.3
Increase in prepaid taxes, due to installment sale		$ 0.3
Hemostasis Products
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Intangible Assets	$ 22.5
Increase (decrease) deferred tax liability, inventory	2.1			$ 2.1
Increase (Decrease) Deferred Tax Asset, Net	1.2
Contrast Media and Delivery Systems
Income Taxes [Line Items]
Discontinued operation, income tax (benefit) expense	$ (0.2)		$ (0.1)	$ (2.9)	$ 0.9