Fair Value - Summary of Fair Value and Carrying Value of Company Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 29, 2020	Dec. 31, 2019	Mar. 31, 2019
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Finance receivables, net	$ 7,391,948	$ 7,419,627	$ 7,520,418
Fair Value \| Medium-term notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	4,013,409	4,816,153	4,675,767
Fair Value \| Senior notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	685,805	774,949	719,544
Fair Value \| Asset-backed Canadian commercial paper conduit facility \| Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	155,243	114,693	142,676
Fair Value \| Asset-backed U.S. commercial paper conduit facilities \| Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	600,000	490,427	526,947
Fair Value \| Asset-backed securitization debt \| Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	1,139,076	768,094	18,674
Fair Value \| Unsecured commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Unsecured commercial paper	1,335,664	571,995	1,192,925
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Finance receivables, net	7,292,407	7,374,366	7,438,592
Carrying Value \| Medium-term notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	4,148,984	4,760,127	4,685,636
Carrying Value \| Senior notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	743,466	743,296	742,791
Carrying Value \| Asset-backed Canadian commercial paper conduit facility \| Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	155,243	114,693	142,676
Carrying Value \| Asset-backed U.S. commercial paper conduit facilities \| Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	600,000	490,427	526,947
Carrying Value \| Asset-backed securitization debt \| Secured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	1,156,845	764,392	18,694
Carrying Value \| Unsecured commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Unsecured commercial paper	$ 1,335,664	$ 571,995	$ 1,192,925

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

+ References

No definition available.

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