Commitments, Contingencies and Guarantees (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 29, 2018	Dec. 31, 2017	Mar. 30, 2017	Dec. 31, 2016
Commitments Contingencies And Guarantees [Abstract]
net present value of alleged amount of UAW arbitration liability	$ 39,000,000
Litigation settlement amount against Boeing	90,000,000
Attorneys fees sought by Boeing related to UAW arbitration	10,000,000
Service warranty roll forward
Product Warranty And Extraordinary Rework	166,400,000
Charges to costs and expenses	(2,100,000)
Product Warranty Accrual, Payments	(2,100,000)
Product Warranty And Extraordinary Rework	162,600,000	$ 166,400,000
Product Warranty Extraordinary Rework Accrual Currency Translation Increase Decrease	400,000
Commitments Contingencies And Guarantees Textuals [Abstract]
Outstanding amount of guarantees	23,000,000	23,200,000
Restricted Cash and Investments, Noncurrent	19,900,000	20,000,000	$ 19,900,000	$ 19,900,000
Product Liability Accrual, Component Amount		101,000,000
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate	$ 174,000,000.0	$ 223,000,000.0