Supplemental Consolidating Data - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 3,257,203	$ 833,868	$ 1,203,766
Accounts receivable, net	143,082	259,334
Finance receivables, net of allowance of $72,632 and $43,006	1,509,539	2,272,522
Inventories, net	523,497	603,571
Restricted cash	131,642	64,554	49,275
Other current assets	280,470	168,974
Total current assets	5,845,433	4,202,823
Finance receivables, net of allowance of $318,304 and $155,575	4,933,469	5,101,844
Property, plant and equipment, net	743,784	847,382
Pension and postretirement assets	95,711	56,014
Goodwill	65,976	64,160
Deferred income taxes	158,538	101,204
Lease assets	45,203	61,618
Other long-term assets	122,487	93,114
Total assets	12,010,601	10,528,159	10,665,664
Current liabilities:
Accounts payable	290,904	294,380
Accrued liabilities	557,214	582,288
Deposits	79,965	0
Short-term debt	1,014,274	571,995
Current portion of long-term debt, net	2,039,597	1,748,109
Total current liabilities	3,981,954	3,196,772
Long-term debt, net	5,932,933	5,124,826
Lease liabilities	30,115	44,447
Pension and postretirement liabilities	114,206	128,651
Deferred income taxes	8,607	8,135
Other long-term liabilities	220,001	221,329
Commitments and contingencies
Shareholders’ equity:
Total shareholders’ equity	1,722,785	1,803,999	$ 1,773,949	$ 1,844,277
Total liabilities and shareholders' equity	12,010,601	$ 10,528,159
Reportable Legal Entities | HDMC Entities
Current assets:
Cash and cash equivalents	666,161
Accounts receivable, net	220,110
Finance receivables, net of allowance of $72,632 and $43,006	0
Inventories, net	523,497
Restricted cash	0
Other current assets	93,510
Total current assets	1,503,278
Finance receivables, net of allowance of $318,304 and $155,575	0
Property, plant and equipment, net	709,845
Pension and postretirement assets	95,711
Goodwill	65,976
Deferred income taxes	69,688
Lease assets	40,564
Other long-term assets	184,300
Total assets	2,669,362
Current liabilities:
Accounts payable	277,429
Accrued liabilities	444,786
Deposits	0
Short-term debt	0
Current portion of long-term debt, net	0
Total current liabilities	722,215
Long-term debt, net	743,977
Lease liabilities	26,313
Pension and postretirement liabilities	114,206
Deferred income taxes	7,166
Other long-term liabilities	171,242
Commitments and contingencies
Shareholders’ equity:
Total shareholders’ equity	884,243
Total liabilities and shareholders' equity	2,669,362
Reportable Legal Entities | HDFS Entities
Current assets:
Cash and cash equivalents	2,591,042
Accounts receivable, net	0
Finance receivables, net of allowance of $72,632 and $43,006	1,509,539
Inventories, net	0
Restricted cash	131,642
Other current assets	190,690
Total current assets	4,422,913
Finance receivables, net of allowance of $318,304 and $155,575	4,933,469
Property, plant and equipment, net	33,939
Pension and postretirement assets	0
Goodwill	0
Deferred income taxes	90,011
Lease assets	4,639
Other long-term assets	33,115
Total assets	9,518,086
Current liabilities:
Accounts payable	90,503
Accrued liabilities	115,506
Deposits	79,965
Short-term debt	1,014,274
Current portion of long-term debt, net	2,039,597
Total current liabilities	3,339,845
Long-term debt, net	5,188,956
Lease liabilities	3,802
Pension and postretirement liabilities	0
Deferred income taxes	1,441
Other long-term liabilities	46,514
Commitments and contingencies
Shareholders’ equity:
Total shareholders’ equity	937,528
Total liabilities and shareholders' equity	9,518,086
Consolidating Adjustments
Current assets:
Cash and cash equivalents	0
Accounts receivable, net	(77,028)
Finance receivables, net of allowance of $72,632 and $43,006	0
Inventories, net	0
Restricted cash	0
Other current assets	(3,730)
Total current assets	(80,758)
Finance receivables, net of allowance of $318,304 and $155,575	0
Property, plant and equipment, net	0
Pension and postretirement assets	0
Goodwill	0
Deferred income taxes	(1,161)
Lease assets	0
Other long-term assets	(94,928)
Total assets	(176,847)
Current liabilities:
Accounts payable	(77,028)
Accrued liabilities	(3,078)
Deposits	0
Short-term debt	0
Current portion of long-term debt, net	0
Total current liabilities	(80,106)
Long-term debt, net	0
Lease liabilities	0
Pension and postretirement liabilities	0
Deferred income taxes	0
Other long-term liabilities	2,245
Commitments and contingencies
Shareholders’ equity:
Total shareholders’ equity	(98,986)
Total liabilities and shareholders' equity	$ (176,847)