Updates to Significant Accounting Policies - Impact On Financial Statements Narratives (Details) - USD ($) $ in Millions	Dec. 31, 2018	Sep. 27, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 133.7
Operating lease liabilities		$ 138.1
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement, Effect of Adoption on Financial Statements	$ 0.0
Operating lease right-of-use assets	123.5
Operating lease liabilities	126.1
Accounting Standards Update 2016-02 [Member] | Operating Income (Loss) [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement, Effect of Adoption on Financial Statements	$ 0.0
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lessee, Operating Lease, Remaining Lease Term		1 year
Minimum | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lessee, Operating Lease, Remaining Lease Term	1 year