Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Revenue Recognition [Line Items]
Revenues	$ 2,626,323	$ 3,248,173	$ 5,627,258	$ 6,348,476
Deferred Service-Type Warranty Revenue	25,439		25,439		$ 27,067
Deferred Service-Type Revenue, Additions			20,845
Deferred Service-Type Revenue Recognized			(22,473)
Revenue, Variable Consideration Reserve	72,000		72,000		108,000
Contract with Customer, Right to Recover Product	58,000		58,000		52,000
Contract with Customer, Refund Liability	104,000		104,000		$ 97,000
North America [Member]
Revenue Recognition [Line Items]
Revenues	1,011,395	1,321,766	2,301,590	2,624,075
Europe [Member]
Revenue Recognition [Line Items]
Revenues	1,211,185	1,516,240	2,574,779	2,961,781
Specialty [Member]
Revenue Recognition [Line Items]
Revenues	404,874	411,636	753,456	765,373
Parts and Services [Domain]
Revenue Recognition [Line Items]
Revenues	2,503,158	3,086,697	5,315,875	6,035,792
Parts and Services [Domain] | North America [Member]
Revenue Recognition [Line Items]
Revenues	892,826	1,165,482	2,000,168	2,321,180
Parts and Services [Domain] | Europe [Member]
Revenue Recognition [Line Items]
Revenues	1,206,330	1,510,952	2,564,299	2,951,793
Parts and Services [Domain] | Specialty [Member]
Revenue Recognition [Line Items]
Revenues	404,002	410,263	751,408	762,819
Other Revenue [Member]
Revenue Recognition [Line Items]
Revenues	$ 123,165	$ 161,476	$ 311,383	$ 312,684