Restructuring Activities - Restructuring Plan Reserve Recorded in Accrued Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 0
Restructuring expense	130,009	$ 32,353	$ 93,401
Utilized – cash	(76,267)
Utilized – non cash	(30,202)
Foreign currency changes	380
Balance, end of period	23,920	0
Employee Severance
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0
Restructuring expense	28,913
Utilized – cash	(21,494)
Utilized – non cash	0
Foreign currency changes	305
Balance, end of period	7,724	0
Contract Termination
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0
Restructuring expense	70,894
Utilized – cash	(54,773)
Utilized – non cash	0
Foreign currency changes	75
Balance, end of period	16,196	0
Accelerated Depreciation
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0
Restructuring expense	30,202
Utilized – cash	0
Utilized – non cash	(30,202)
Foreign currency changes	0
Balance, end of period	0	0
Motorcycles
Restructuring Reserve [Roll Forward]
Balance, beginning of period	867	28,498	0
Restructuring expense	119,110	32,353	93,401
Utilized – cash		(44,170)	(29,599)
Utilized – non cash		(15,778)	(34,654)
Foreign currency changes		(36)	650
Balance, end of period		867	28,498
Motorcycles | 2018 Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	867	25,037	0
Restructuring expense		32,670	89,502
Utilized – cash		(41,052)	(29,155)
Utilized – non cash		(15,778)	(34,654)
Foreign currency changes		(10)	656
Balance, end of period		867	25,037
Motorcycles | 2018 Reorganization Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0	3,461	0
Restructuring expense		(317)	3,899
Utilized – cash		(3,118)	(444)
Utilized – non cash		0	0
Foreign currency changes		(26)	(6)
Balance, end of period		0	3,461
Motorcycles | Employee Severance | 2018 Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	865	24,958	0
Restructuring expense		15	38,666
Utilized – cash		(24,102)	(13,060)
Utilized – non cash		0	0
Foreign currency changes		(6)	648
Balance, end of period		865	24,958
Motorcycles | Accelerated Depreciation | 2018 Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	0	0	0
Restructuring expense		14,684	34,654
Utilized – cash		0	0
Utilized – non cash		(14,684)	(34,654)
Foreign currency changes		0	0
Balance, end of period		0	0
Motorcycles | Other Project Implementation Costs | 2018 Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 2	79	0
Restructuring expense		17,971	16,182
Utilized – cash		(16,950)	(16,095)
Utilized – non cash		(1,094)	0
Foreign currency changes		(4)	8
Balance, end of period		$ 2	$ 79