Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities from continuing operations:
Net earnings (loss)	$ (122,250)	$ (24,410)	$ 284,613
Less: Loss from discontinued operations, net of tax	(10,254)	(1,138)	(2,309)
Earnings (loss) from continuing operations	(111,996)	(23,272)	286,922
Depreciation expense	2,027,413	1,878,929	1,388,570
Goodwill impairment charge	0	0	15,513
Used vehicle sales, net	(414)	58,706	22,325
Amortization expense and other non-cash charges, net	115,519	101,289	67,936
Non-cash lease expense	92,227	94,039	87,741
Non-operating pension costs and share-based compensation expense	41,160	86,234	32,493
Deferred income tax expense (benefit)	(32,865)	(32,331)	108,895
Collections on sales-type leases	114,462	121,201	82,803
Changes in operating assets and liabilities, net of acquisitions:
Receivables	(5,356)	27,149	(193,144)
Inventories	20,094	(1,334)	(5,782)
Prepaid expenses and other assets	(91,969)	(65,185)	(84,727)
Accounts payable	28,863	(26,596)	16,869
Accrued expenses and other non-current liabilities	(15,835)	(78,290)	(108,421)
Net cash provided by operating activities from continuing operations	2,181,303	2,140,539	1,717,993
Cash flows from investing activities from continuing operations:
Purchases of property and revenue earning equipment	(1,146,521)	(3,735,174)	(3,050,409)
Sales of revenue earning equipment	538,894	465,705	379,716
Sales of operating property and equipment	13,334	52,276	16,606
Acquisitions, net of cash acquired	0	0	(167,372)
Other	(6,704)	0	0
Net cash used in investing activities from continuing operations	(600,997)	(3,217,193)	(2,821,459)
Cash flows from financing activities from continuing operations:
Net borrowings (repayments) of commercial paper and other	(377,273)	(15,492)	62,147
Debt proceeds	2,084,343	3,016,348	2,283,012
Debt repayments	(3,055,380)	(1,775,685)	(1,128,390)
Dividends on common stock	(119,036)	(116,469)	(111,864)
Common stock repurchased	(29,219)	(27,686)	(30,810)
Other	(10,613)	3,123	11,420
Net cash provided by (used in) financing activities from continuing operations	(1,507,178)	1,084,139	1,085,515
Effect of exchange rates on cash, cash equivalents, and restricted cash	5,132	(4,272)	4,694
Increase (decrease) increase in cash, cash equivalents, and restricted cash from continuing operations	78,260	3,213	(13,257)
Increase (decrease) in cash, cash equivalents, and restricted cash from discontinued operations	(550)	2,260	(1,654)
Increase (decrease) in cash, cash equivalents, and restricted cash	77,710	5,473	(14,911)
Cash, cash equivalents, and restricted cash at January 1	73,584	68,111	83,022
Cash, cash equivalents, and restricted cash at December 31	$ 151,294	$ 73,584	$ 68,111