Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue Recognition [Line Items]
Revenues	$ 3,296,611	$ 3,047,684	$ 9,902,511	$ 8,674,942
Deferred Service-Type Warranty Revenue	31,747		31,747		$ 25,622
Deferred Service-Type Revenue, Additions			51,159
Deferred Service-Type Revenue Recognized			(45,034)
Revenue, Variable Consideration Reserve	131,000		131,000		127,000
Contract with Customer, Right to Recover Product	59,000		59,000		57,000
Contract with Customer, Refund Liability	108,000		108,000		$ 102,000
Specialty [Member]
Revenue Recognition [Line Items]
Revenues	465,842	400,429	1,457,060	1,153,885
North America
Revenue Recognition [Line Items]
Revenues	1,306,965	1,164,241	3,884,352	3,465,831
Europe
Revenue Recognition [Line Items]
Revenues	1,525,274	1,484,099	4,565,388	4,058,878
Parts and Services [Domain]
Revenue Recognition [Line Items]
Revenues	3,061,308	2,885,729	9,171,345	8,201,604
Parts and Services [Domain] | Specialty [Member]
Revenue Recognition [Line Items]
Revenues	465,027	399,554	1,454,389	1,150,962
Parts and Services [Domain] | North America
Revenue Recognition [Line Items]
Revenues	1,076,599	1,007,001	3,172,207	3,007,169
Parts and Services [Domain] | Europe
Revenue Recognition [Line Items]
Revenues	1,519,682	1,479,174	4,544,749	4,043,473
Other Revenue [Member]
Revenue Recognition [Line Items]
Revenues	$ 235,303	$ 161,955	$ 731,166	$ 473,338