Advance Payments and Deferred Revenue/Credits (Details) $ in Millions	Apr. 02, 2020 USD ($)
advance payments [Line Items]
Customer advances- B787 program	$ 212.1
Total Payment [Member]
advance payments [Line Items]
Customer advances- B737 program	123.0
Total Payment [Member]
advance payments [Line Items]
Customer advances- B737 program	225.0
Production Stabilization [Member]
advance payments [Line Items]
Customer advances- B737 program	70.0
To be repaid in 2021 [Member]
advance payments [Line Items]
Customer advances- B737 program	10.0
Prepayment of shipset deliveries [Member]
advance payments [Line Items]
Customer advances- B737 program	$ 155.0