Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Revenue Recognition [Line Items]
Revenues	$ 3,047,684	$ 3,147,773	$ 8,674,942	$ 9,496,249
Deferred Service-Type Warranty Revenue	25,869		25,869		$ 27,067
Deferred Service-Type Revenue, Additions			32,310
Deferred Service-Type Revenue Recognized			(33,508)
Revenue, Variable Consideration Reserve	103,000		103,000		108,000
Contract with Customer, Right to Recover Product	61,000		61,000		52,000
Contract with Customer, Refund Liability	106,000		106,000		97,000
Restructuring Costs	2,000	7,000	8,000	13,000
2019 Global Restructuring Program [Member]
Revenue Recognition [Line Items]
Restructuring Costs	1,000	18,000	6,000	23,000	$ 37,000
North America [Member]
Revenue Recognition [Line Items]
Revenues	1,164,241	1,302,147	3,465,831	3,926,222
Europe [Member]
Revenue Recognition [Line Items]
Revenues	1,484,099	1,451,483	4,058,878	4,413,264
Specialty [Member]
Revenue Recognition [Line Items]
Revenues	400,429	395,314	1,153,885	1,160,687
Parts and Services [Domain]
Revenue Recognition [Line Items]
Revenues	2,885,729	2,985,998	8,201,604	9,021,790
Parts and Services [Domain] | North America [Member]
Revenue Recognition [Line Items]
Revenues	1,007,001	1,145,402	3,007,169	3,466,582
Parts and Services [Domain] | Europe [Member]
Revenue Recognition [Line Items]
Revenues	1,479,174	1,446,392	4,043,473	4,398,185
Parts and Services [Domain] | Specialty [Member]
Revenue Recognition [Line Items]
Revenues	399,554	394,204	1,150,962	1,157,023
Other Revenue [Member]
Revenue Recognition [Line Items]
Revenues	$ 161,955	$ 161,775	$ 473,338	$ 474,459