Fair Value Of Financial Instruments (Summary Of The Fair Value And Carrying Value Of The Company's Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Restricted cash	$ 144,807	$ 188,008
Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents	1,066,612	1,068,138
Marketable securities	129,181	154,051
Accounts receivable, net	261,065	230,079
Derivatives, Assets	1,932	317
Finance receivables, net	6,086,441	5,861,442
Restricted cash	144,807	188,008
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Accounts payable	239,794	257,386
Derivatives, Liabilities	3,925	7,920
Estimate of Fair Value Measurement [Member] \| Unsecured Commercial Paper [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	666,317	294,943
Estimate of Fair Value Measurement [Member] \| Asset-backed Canadian Commercial Paper Conduit Facility [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	174,241	175,658
Estimate of Fair Value Measurement [Member] \| Medium-term Notes [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	3,087,852	3,199,548
Estimate of Fair Value Measurement [Member] \| Senior Unsecured Notes [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	305,958	338,594
Estimate of Fair Value Measurement [Member] \| Secured Debt [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	1,259,314	1,457,807
Reported Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents	1,066,612	1,068,138
Marketable securities	129,181	154,051
Accounts receivable, net	261,065	230,079
Derivatives, Assets	1,932	317
Finance receivables, net	5,999,563	5,781,852
Restricted cash	144,807	188,008
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Accounts payable	239,794	257,386
Derivatives, Liabilities	3,925	7,920
Reported Value Measurement [Member] \| Unsecured Commercial Paper [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	666,317	294,943
Reported Value Measurement [Member] \| Asset-backed Canadian Commercial Paper Conduit Facility [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	174,241	175,658
Reported Value Measurement [Member] \| Medium-term Notes [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	2,858,980	2,881,272
Reported Value Measurement [Member] \| Senior Unsecured Notes [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	303,000	303,000
Reported Value Measurement [Member] \| Secured Debt [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Debt instrument, fair value	$ 1,256,632	$ 1,447,776

Fair value portion of liabilities incurred for goods and services received that are used in an entity's business and related party payables.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 14

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Subparagraph a

-Article 5

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Fair value portion of amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties.

+ References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

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-Name Accounting Standards Codification

-Glossary Cash Equivalents

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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- Definition

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.

+ References

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Fair value, after the effects of master netting arrangements, of a financial liability or 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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

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- Definition

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.

+ References

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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.

+ References

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