Restructuring Activities - Restructuring Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Restructuring Cost and Reserve
Restructuring expense	$ 41,949	$ 10,423	$ 41,949	$ 24,053
Motorcycles and Related Products
Restructuring Cost and Reserve
Restructuring expense	41,005	10,423	41,005	24,053
Financial services
Restructuring Cost and Reserve
Restructuring expense	944	$ 0	944	$ 0
2020 Restructuring Activities
Restructuring Cost and Reserve
Restructuring expense	41,900		41,900
2020 Restructuring Activities | Motorcycles and Related Products
Restructuring Cost and Reserve
Restructuring expense	41,000		41,000
2020 Restructuring Activities | Financial services
Restructuring Cost and Reserve
Restructuring expense	$ 900		$ 900