Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities of continuing operations:
Net earnings	$ 790,558	$ 262,477	$ 304,768
Less: Loss from discontinued operations, net of tax	(457)	(2,163)	(1,221)
Earnings from continuing operations	791,015	264,640	305,989
Depreciation expense	1,255,175	1,187,050	1,121,966
Used vehicle sales, net	17,241	(972)	(99,853)
Amortization expense and other non-cash charges, net	12,114	30,667	52,965
Non-operating pension costs and share-based compensation expense	46,708	56,257	38,978
Deferred income tax (benefit) expense	(499,783)	124,886	154,042
Changes in operating assets and liabilities, net of acquisitions:
Receivables	(173,840)	(51,754)	(40,323)
Inventories	(3,296)	(5,906)	1,448
Prepaid expenses and other assets	(38,878)	(14,211)	(292)
Accounts payable	66,149	94,320	(74,381)
Accrued expenses and other non-current liabilities	75,381	(83,955)	(18,751)
Net cash provided by operating activities from continuing operations	1,547,986	1,601,022	1,441,788
Cash flows from financing activities from continuing operations:
Net change in commercial paper borrowings and revolving credit facilities	89,519	(77,798)	323,359
Debt proceeds	873,302	674,928	1,283,223
Debt repaid	(962,577)	(669,047)	(798,311)
Dividends on common stock	(95,813)	(91,043)	(83,201)
Common stock issued	20,508	18,087	23,635
Common stock repurchased	(78,316)	(37,274)	(6,141)
Debt issuance costs and other items	(1,738)	(3,775)	(11,079)
Net cash (used in) provided by financing activities from continuing operations	(155,115)	(185,922)	731,485
Cash flows from investing activities from continuing operations:
Purchases of property and revenue earning equipment	(1,860,436)	(1,905,157)	(2,667,978)
Sales of revenue earning equipment	376,743	414,249	423,605
Sales of operating property and equipment	52,257	7,051	3,891
Acquisitions	(7,240)	0	0
Collections on direct finance leases and other items	73,172	76,510	70,980
Changes in restricted cash	(836)	1,514	8,147
Net cash used in investing activities from continuing operations	(1,366,340)	(1,405,833)	(2,161,355)
Effect of exchange rates on cash	(5,539)	(9,482)	37
Increase (decrease) in cash and cash equivalents from continuing operations	20,992	(215)	11,955
Decrease in cash and cash equivalents from discontinued operations	(1,445)	(1,929)	(1,102)
Increase (decrease) increase in cash and cash equivalents	19,547	(2,144)	10,853
Cash and cash equivalents at January 1	58,801	60,945	50,092
Cash and cash equivalents at December 31	$ 78,348	$ 58,801	$ 60,945