Finance Receivables (Aging Of Past Due Finance Receivables Including Non Accrual Status Finance Receivables) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jul. 01, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 6,207,179	$ 5,709,381	$ 6,004,738
31-60 Days Past Due	91,297	114,588	85,983
61-90 Days Past Due	24,304	37,517	24,715
Greater than 90 Days Past Due	14,130	28,033	15,381
Total Past Due	129,731	180,138	126,079
Total Finance Receivables	6,336,910	5,889,519	6,130,817
Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,119,572	4,894,675	5,101,847
31-60 Days Past Due	90,790	113,604	84,858
61-90 Days Past Due	24,023	37,239	24,247
Greater than 90 Days Past Due	13,904	27,597	14,827
Total Past Due	128,717	178,440	123,932
Total Finance Receivables	5,248,289	5,073,115	5,225,779
Wholesale [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,087,607	814,706	902,891
31-60 Days Past Due	507	984	1,125
61-90 Days Past Due	281	278	468
Greater than 90 Days Past Due	226	436	554
Total Past Due	1,014	1,698	2,147
Total Finance Receivables	$ 1,088,621	$ 816,404	$ 905,038