Additional Balance Sheet and Cash Flow Information (Reconciliation Of Net Income (Loss) To Net Cash Provided By Operating Activities Of Continuing Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 531,451	$ 521,759	$ 692,164
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangibles	264,863	222,188	209,555
Amortization of deferred loan origination costs	81,315	82,911	86,681
Amortization of financing origination fees	8,367	8,045	9,252
Provision for long-term employee benefits	36,481	29,900	38,273
Employee benefit plan contributions and payments	(10,544)	(63,277)	(55,809)
Stock compensation expense	35,539	32,491	32,336
Net change in wholesale finance receivables related to sales	(56,538)	35,172	(3,233)
Provision for credit losses	106,870	132,444	136,617
Gain on off-balance sheet asset-backed securitization	0	0	(9,269)
Loss on debt extinguishment	0	0	118
Deferred income taxes	(33,981)	50,855	(165)
Other, net	37,554	8,559	(6,907)
Changes in current assets and liabilities:
Accounts receivable, net	9,143	(18,149)	(45,934)
Finance receivables – accrued interest and other	773	(1,313)	(1,489)
Inventories	(31,059)	(20,584)	85,072
Accounts payable and accrued liabilities	196,192	10,128	38,237
Derivative instruments	473	1,866	(3,413)
Other	29,022	(27,934)	(27,747)
Total adjustments	674,470	483,302	482,175
Net cash provided by operating activities	1,205,921	1,005,061	1,174,339
Supplemental Cash Flow Information [Abstract]
Interest	207,484	204,866	185,804
Income taxes	$ 149,436	$ 300,113	$ 356,553