Commitments, Contingencies and Guarantees (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 27, 2019	Dec. 31, 2018	Jun. 28, 2018	Dec. 31, 2017
Commitments Contingencies And Guarantees [Abstract]
Restricted Cash, Noncurrent	$ 16,400,000	$ 20,200,000	$ 20,000,000.0	$ 20,000,000.0
Service warranty roll forward
Product Warranty And Extraordinary Rework	104,800,000
Charges to costs and expenses	10,200,000
Product Warranty Accrual, Payments	(2,100,000)
TGI Warranty Settlement	(25,000,000.0)
Product Warranty And Extraordinary Rework	67,500,000	104,800,000
Product Warranty Extraordinary Rework Accrual Currency Translation Increase Decrease	0
Commitments Contingencies And Guarantees Textuals [Abstract]
Product Liability Accrual, Component Amount	8,100,000	41,000,000.0
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate	$ 12,100,000	$ 34,000,000.0