Fair Value Of Financial Instruments (Summary Of Fair Value And Carrying Value Of Company Financial Instruments) (Detail) - USD ($) $ in Thousands	Mar. 27, 2016	Dec. 31, 2015	Mar. 29, 2015
Assets:
Restricted cash	$ 93,192	$ 88,267	$ 120,428
Fair Value [Member]
Assets:
Cash equivalents	694,013	722,209	1,168,724
Marketable securities	83,689	81,448	94,886
Derivatives	3,651	16,235	49,290
Finance receivables, net	7,462,125	6,937,053	6,927,898
Restricted cash	114,924	110,642	150,631
Liabilities:
Derivatives	3,176	1,300	1,886
Lines of Credit, Fair Value Disclosure	101	0	0
Carrying Value [Member]
Assets:
Cash equivalents	694,013	722,209	1,168,724
Marketable securities	83,689	81,448	94,886
Derivatives	3,651	16,235	49,290
Finance receivables, net	7,376,566	6,868,153	6,848,592
Restricted cash	114,924	110,642	150,631
Liabilities:
Derivatives	3,176	1,300	1,886
Lines of Credit, Fair Value Disclosure	101	0	0
Unsecured Commercial Paper [Member] \| Fair Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	869,972	1,201,380	70,329
Unsecured Commercial Paper [Member] \| Carrying Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	869,972	1,201,380	70,329
Asset-Backed Canadian Commercial Paper Conduit Facility [Member] \| Fair Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	153,311	153,839	154,035
Asset-Backed Canadian Commercial Paper Conduit Facility [Member] \| Carrying Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	153,311	153,839	154,035
Medium-term Notes [Member] \| Fair Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	4,217,449	3,410,966	4,176,254
Medium-term Notes [Member] \| Carrying Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	4,061,832	3,316,949	3,922,136
Senior Unsecured Notes [Member] \| Fair Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	777,336	737,435	0
Senior Unsecured Notes [Member] \| Carrying Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	740,821	746,934	0
Secured Debt [Member] \| Fair Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	1,288,292	1,455,776	1,771,363
Secured Debt [Member] \| Carrying Value [Member]
Liabilities:
Debt Instrument, Fair Value Disclosure	$ 1,286,729	$ 1,459,377	$ 1,766,014

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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