Finance Receivables (Aging Of Past Due Finance Receivables Including Non Accrual Status Finance Receivables) (Detail) - USD ($) $ in Thousands	Mar. 26, 2017	Dec. 31, 2016	Mar. 27, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 164,413	$ 222,988	$ 149,974
Total finance receivables	7,330,152	7,008,801	7,532,750
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, current	7,165,739	6,785,813	7,382,776
31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	101,600	132,302	96,391
61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	33,676	49,961	30,229
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	29,137	40,725	23,354
Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	162,386	221,393	147,954
Total finance receivables	6,002,550	5,982,211	6,012,804
Retail | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, current	5,840,164	5,760,818	5,864,850
Retail | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	100,471	131,302	94,984
Retail | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	33,403	49,642	30,094
Retail | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	28,512	40,449	22,876
Wholesale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,027	1,595	2,020
Total finance receivables	1,327,602	1,026,590	1,519,946
Wholesale | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, current	1,325,575	1,024,995	1,517,926
Wholesale | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,129	1,000	1,407
Wholesale | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	273	319	135
Wholesale | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 625	$ 276	$ 478