Financial Instruments and Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 16, 2018	Dec. 29, 2017
Recurring
Assets:
Rabbi Trust Investments, Fair Value Disclosure	$ 35.3		$ 35.4
Equity Securities, Fair Value Disclosure	19.4		22.7
Foreign exchange forward and option contracts			0.1
Total assets at fair value	54.7		58.2
Liabilities:
Deferred Compensation Liability, Fair Value	38.4		42.7
Contingent consideration and acquired contingent liabilities	222.0		246.4
Foreign exchange forward and option contracts	0.1		0.1
Total liabilities at fair value	260.5		289.2
Recurring | Level 1
Assets:
Rabbi Trust Investments, Fair Value Disclosure	24.4		24.0
Equity Securities, Fair Value Disclosure	19.4		22.7
Foreign exchange forward and option contracts			0.1
Total assets at fair value	43.8		46.8
Liabilities:
Deferred Compensation Liability, Fair Value	0.0		0.0
Contingent consideration and acquired contingent liabilities	0.0		0.0
Foreign exchange forward and option contracts	0.1		0.1
Total liabilities at fair value	0.1		0.1
Recurring | Level 2
Assets:
Rabbi Trust Investments, Fair Value Disclosure	10.9		11.4
Equity Securities, Fair Value Disclosure	0.0		0.0
Foreign exchange forward and option contracts			0.0
Total assets at fair value	10.9		11.4
Liabilities:
Deferred Compensation Liability, Fair Value	38.4		42.7
Contingent consideration and acquired contingent liabilities	0.0		0.0
Foreign exchange forward and option contracts	0.0		0.0
Total liabilities at fair value	38.4		42.7
Recurring | Level 3
Assets:
Rabbi Trust Investments, Fair Value Disclosure	0.0		0.0
Equity Securities, Fair Value Disclosure	0.0		0.0
Foreign exchange forward and option contracts			0.0
Total assets at fair value	0.0		0.0
Liabilities:
Deferred Compensation Liability, Fair Value	0.0		0.0
Contingent consideration and acquired contingent liabilities	222.0		246.4
Foreign exchange forward and option contracts	0.0		0.0
Total liabilities at fair value	222.0		$ 246.4
Specialty Generics Disposal Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Disposal Group, Not Discontinued Operation, Contingent Consideration		$ (12.1)
Contingent Liabilities | PreveLeak | Recurring | Level 3
Liabilities:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	$ (12.0)