Debt (Details) € in Millions					1 Months Ended	12 Months Ended
	Oct. 13, 2019 USD ($)	Sep. 12, 2019 USD ($)	Apr. 11, 2018 USD ($)	Jul. 19, 2016 USD ($)	Oct. 25, 2011 USD ($)	Dec. 29, 2019 USD ($)	Dec. 30, 2012 USD ($)	Dec. 29, 2019 EUR (€)	Sep. 17, 2019 USD ($)	Dec. 30, 2018 USD ($)	Dec. 30, 2018 EUR (€)	Jul. 19, 2016 EUR (€)	Sep. 30, 2012 USD ($)
Unamortized discount and debt issuance costs						$ (21,426,000)
Maturities of Long-term Debt [Abstract]
2017						9,974,000
2018						343,280,000
2019						3,759,000
2020						2,278,000
2021						326,664,000
Thereafter						1,409,486,000
Long-term Debt Before Unamortized Discount						2,095,441,000
Total						2,074,015,000
Other Long-term Debt, Current						9,974,000				$ 14,856,000
Line of Credit, Maturing August 11, 2021 [Member]
Aggregate borrowings under the amended facility										418,000,000.0
Unamortized Debt Issuance Expense										2,400,000
Maturities of Long-term Debt [Abstract]
Total										415,600,000
Line of Credit, Maturing September 17, 2024 [Member]
Unsecured revolving credit facility, amount									$ 1,000,000,000.0
Line of Credit Facility, Remaining Borrowing Capacity						663,200,000
Letters of credit issued and outstanding						$ 11,400,000
Interest rate terms under amended senior unsecured revolving credit facility						The interest rates on the Eurocurrency Rate loans are based on the Eurocurrency Rate at the time of borrowing, plus a percentage spread based on the credit rating of the Company's debt. The interest rates on the US Dollar Base Rate loans are based on the US Dollar Base Rate at the time of borrowing, plus a percentage spread based on the credit rating of the Company's debt. The base rate is the higher of (i) the Federal Funds Rate (as defined in the new credit agreement) plus 50 basis points, (ii) the rate of interest in effect for such day as publicly announced from time to time by Bank of America as its "prime rate," or (iii) the Eurocurrency Rate plus 1.00%. The Eurocurrency margin as of December 29, 2019 was 102.0 basis points.
Weighted average interest rates under amended senior unsecured revolving credit facility						The weighted average Eurocurrency interest rate as of December 29, 2019 was 1.67%, resulting in a weighted average effective Eurocurrency Rate, including the margin, of 2.68%, which was the interest applicable to the borrowings outstanding as of December 29, 2019.
Aggregate borrowings under the amended facility						$ 325,400,000
Unamortized discount and debt issuance costs						(3,356,000)
Unamortized Debt Issuance Expense						3,400,000
Maturities of Long-term Debt [Abstract]
2017						0
2018						0
2019						0
2020						0
2021						325,377,000
Thereafter						0
Long-term Debt Before Unamortized Discount						325,377,000
Total						$ 322,021,000
Line of Credit, Maturing September 17, 2024 [Member] | Base Rate Option Three [Member] | Line of Credit [Member]
Basis spread on variable rate						1.00%
Line of Credit, Maturing September 17, 2024 [Member] | Eurocurrency Rate [Member]
Basis spread on variable rate						1.02%
Line of Credit, Maturing September 17, 2024 [Member] | Base Rate Option Two [Member] | Line of Credit [Member]
Basis spread on variable rate						0.50%
Line of Credit, Maturing December 16, 2016 [Member] | Eurocurrency Rate [Member]
Description of variable rate basis						Eurocurrency margin
Line of Credit, Maturing December 16, 2016 [Member] | Base Rate Option Two [Member]
Description of variable rate basis						Federal Funds
2021 Notes [Member]
Unsecured senior notes, interest rate percent					5.00%
Unsecured senior notes, face value					$ 500,000,000.0
Gross proceeds from the issuance of debt instrument					$ 493,600,000
Senior unsecured notes issuance as percentage of principal amount					99.40%
Unamortized Debt Issuance Expense										1,600,000
Debt Redemption, Make-whole						$ 31,300,000
Debt Redemption, Pre-tax Non-operating Charges						32,300,000
Debt Redemption, Deferred costs and Original Issue Discount						2,000,000.0
Reverse Treasury Rate Lock Settlement	$ 1,000,000.0					(1,000,000.0)
Maturities of Long-term Debt [Abstract]
Total										497,400,000
1.875 Percent Ten Year Senior Unsecured Notes [Member]
Debt Instrument, Maturity Date				Jul. 19, 2026
Unsecured senior notes, interest rate percent												1.875%
Gross proceeds from the issuance of debt instrument				$ 492,300,000
Senior unsecured notes issuance as percentage of principal amount												99.118%
Unamortized discount and debt issuance costs						(6,756,000)
Unamortized Debt Issuance Expense						3,300,000				3,800,000
Debt Instrument, Redemption Percentage Upon Change of Control and Downgrade of Debt Instrument				101.00%
Maturities of Long-term Debt [Abstract]
2017						0
2018						0
2019						0
2020						0
2021						0
Thereafter						558,950,000
Long-term Debt Before Unamortized Discount						558,950,000
Total						$ 552,194,000				564,500,000
Financing Lease Obligations [Member]
Additional Financing Lease Obligations							$ 11,500,000
Maturities of Long-term Debt [Abstract]
Other Long-term Debt													$ 29,300,000
Other Long-term Debt, Current										1,500,000
Other Long-term Debt, Noncurrent										33,000,000.0
Other Debt Facilities - EUROIMMUN [Member]
Maturities of Long-term Debt [Abstract]
Long-term Debt, Percentage Bearing Fixed Interest, Amount | €								€ 25.6
Long-term Debt, Percentage Bearing Variable Interest, Amount | €								€ 0.1
Other Debt Facilities - EUROIMMUN [Member] | Minimum [Member]
Unsecured senior notes, interest rate percent						1.10%		1.10%
Other Debt Facilities - EUROIMMUN [Member] | Maximum [Member]
Unsecured senior notes, interest rate percent						21.50%		21.50%
Other Debt Facilities - EUROIMMUN [Member] | Euribor Rate [Member]
Basis spread on variable rate						1.50%
Other Debt Facilities [Member]
Unamortized discount and debt issuance costs						$ 0
Maturities of Long-term Debt [Abstract]
2017						9,974,000
2018						7,910,000
2019						3,759,000
2020						2,278,000
2021						1,287,000
Thereafter						536,000
Long-term Debt Before Unamortized Discount						25,744,000
Total						$ 25,744,000
Other Unsecured Revolving Debt Facilities [Member]
Other Unsecured Revolving Credit Facility										5,800,000
Other Unsecured Revolving Debt Facilities [Member] | Minimum [Member]
Unsecured senior notes, interest rate percent						2.30%		2.30%
Other Secured Bank Loan [Member]
Maturities of Long-term Debt [Abstract]
Secured Debt | €								€ 1.9			€ 0.3
Other Secured Bank Loan [Member] | Minimum [Member]
Unsecured senior notes, interest rate percent						1.95%		1.95%
Other Secured Bank Loan [Member] | Maximum [Member]
Unsecured senior notes, interest rate percent						21.50%		21.50%
0.6 Percent Senior Unsecured Notes due in April 2021 [Member]
Interest rate terms under amended senior unsecured revolving credit facility						Interest on the April 2021 Notes is payable annually on April 9th each year.
Unsecured senior notes, interest rate percent			0.60%
Gross proceeds from the issuance of debt instrument			$ 298,700,000
Senior unsecured notes issuance as percentage of principal amount			99.95%
Unamortized discount and debt issuance costs						$ (1,194,000)
Unamortized Debt Issuance Expense										$ 2,000,000.0
Debt Instrument, Redemption Percentage Upon Change of Control and Downgrade of Debt Instrument			101.00%
Maturities of Long-term Debt [Abstract]
2017						0
2018						335,370,000
2019						0
2020						0
2021						0
Thereafter						0
Long-term Debt Before Unamortized Discount						335,370,000
Total						$ 334,176,000
0.6 Percent Senior Unsecured Notes due in April 2021 [Member] | Treasury Rate [Member]
Basis spread on variable rate						0.15%
3.3 Percent Ten Year Senior Unsecured Notes due in Sept 2029 [Member]
Interest rate terms under amended senior unsecured revolving credit facility						The 2029 Notes mature in September 2029 and bear interest at an annual rate of 3.3%. Interest on the 2029 Notes is payable semi-annually on March 15th and September 15th each year.
Unsecured senior notes, interest rate percent		3.30%
Unsecured senior notes, face value		$ 850,000,000.0
Gross proceeds from the issuance of debt instrument		$ 847,200,000
Senior unsecured notes issuance as percentage of principal amount		99.67%
Unamortized discount and debt issuance costs						$ (10,120,000)
Unamortized Debt Issuance Expense						7,400,000
Debt Instrument, Redemption Percentage Upon Change of Control and Downgrade of Debt Instrument		101.00%
Maturities of Long-term Debt [Abstract]
2017						0
2018						0
2019						0
2020						0
2021						0
Thereafter						850,000,000
Long-term Debt Before Unamortized Discount						850,000,000
Total						$ 839,880,000
3.3 Percent Ten Year Senior Unsecured Notes due in Sept 2029 [Member] | Treasury Rate [Member]
Basis spread on variable rate						0.25%
Euro Member Countries, Euro | 1.875 Percent Ten Year Senior Unsecured Notes [Member]
Unsecured senior notes, face value | €												€ 500.0
Euro Member Countries, Euro | Other Debt Facilities - EUROIMMUN [Member]
Maturities of Long-term Debt [Abstract]
Other Long-term Debt | €								€ 21.3			28.0
Euro Member Countries, Euro | 0.6 Percent Senior Unsecured Notes due in April 2021 [Member]
Unsecured senior notes, face value			$ 300,000,000.0
United States of America, Dollars | Other Debt Facilities - EUROIMMUN [Member]
Maturities of Long-term Debt [Abstract]
Other Long-term Debt | €								23.8			€ 32.1
Long-term Debt, Percentage Bearing Fixed Interest, Amount | €								23.7
Secured Debt | €								6.3
Unsecured Debt | €								€ 17.5
United States of America, Dollars | Other Debt Facilities - EUROIMMUN [Member] | Minimum [Member]
Unsecured senior notes, interest rate percent						1.10%		1.10%
United States of America, Dollars | Other Debt Facilities - EUROIMMUN [Member] | Maximum [Member]
Unsecured senior notes, interest rate percent						4.30%		4.30%