SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of segments \| segment			3
Lease & related maintenance and rental revenues	$ 868,660	$ 933,833	$ 1,796,416	$ 1,833,392
Revenues	1,895,282	2,244,993	4,056,588	4,425,320
Earnings (Loss) Before Taxes	(53,331)	111,486	(134,769)	204,824
Non-operating pension costs	(936)	(6,713)	(2,157)	(13,175)
Other items impacting comparability, net	(37,200)	(9,836)	(68,147)	(16,014)
Earnings (loss) from continuing operations before income taxes	(94,777)	103,069	(208,411)	171,220
Capital expenditures paid	273,970	1,184,050	704,930	2,210,761
Operating Segments \| FMS
Segment Reporting Information [Line Items]
Revenues	1,198,177	1,390,910	2,538,414	2,742,509
Earnings (Loss) Before Taxes	(103,735)	57,746	(218,309)	118,657
Capital expenditures paid	256,216	1,161,089	679,332	2,167,218
Operating Segments \| FMS \| ChoiceLease
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenues	766,161	757,271	1,558,367	1,497,329
Operating Segments \| FMS \| SelectCare
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenues	125,851	136,360	261,997	272,138
Operating Segments \| FMS \| Commercial rental
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenues	169,171	253,871	374,937	490,019
Operating Segments \| FMS \| Other
Segment Reporting Information [Line Items]
Lease & related maintenance and rental revenues	12,332	22,996	35,758	46,225
Operating Segments \| FMS \| Fuel services revenue
Segment Reporting Information [Line Items]
Revenues	117,253	212,371	290,588	420,237
Operating Segments \| FMS \| Choice lease liability insurance revenue
Segment Reporting Information [Line Items]
Revenues	7,409	8,041	16,767	16,561
Operating Segments \| SCS
Segment Reporting Information [Line Items]
Revenues	519,318	649,311	1,147,765	1,284,982
Earnings (Loss) Before Taxes	36,916	45,774	67,941	78,091
Capital expenditures paid	13,868	12,738	19,874	25,494
Operating Segments \| DTS
Segment Reporting Information [Line Items]
Revenues	293,944	362,244	628,832	711,865
Earnings (Loss) Before Taxes	21,233	27,132	33,413	44,544
Capital expenditures paid	339	517	763	860
Eliminations
Segment Reporting Information [Line Items]
Revenues	(116,157)	(157,472)	(258,423)	(314,036)
Earnings (Loss) Before Taxes	(7,745)	(19,166)	(17,814)	(36,468)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated Central Support Services	(10,718)	(10,482)	(20,104)	(23,029)
Non-operating pension costs	(936)	(6,713)	(2,157)	(13,175)
Other items impacting comparability, net	(29,792)	8,778	(51,381)	2,600
Capital expenditures paid	$ 3,547	$ 9,706	$ 4,961	$ 17,189

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