Fair Value - Summary of Fair Value and Carrying Value of Company Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Dec. 31, 2020	Mar. 29, 2020
Fair Value
ASSETS
Finance receivables, net	$ 6,930,531	$ 6,586,348	$ 7,391,948
Liabilities
Deposits, net	152,715	79,965	0
Fair Value \| Medium-term notes
Debt
Long-term debt, fair value	3,955,743	5,118,928	4,013,409
Fair Value \| Senior notes
Debt
Long-term debt, fair value	789,967	828,141	685,805
Fair Value \| Asset-backed U.S. commercial paper conduit facilities \| Secured Debt
Debt
Long-term debt, fair value	350,648	402,205	600,000
Fair Value \| Asset-backed Canadian commercial paper conduit facility \| Secured Debt
Debt
Long-term debt, fair value	102,543	116,678	155,243
Fair Value \| Asset-backed securitization debt \| Secured Debt
Debt
Long-term debt, fair value	2,120,855	1,817,892	1,139,076
Fair Value \| Unsecured commercial paper
Debt
Unsecured commercial paper	749,801	1,014,274	1,335,664
Fair Value \| U.S. Line of Credit
Debt
Unsecured commercial paper	15,462	0	0
Carrying Value
ASSETS
Finance receivables, net	6,756,777	6,443,008	7,292,407
Liabilities
Deposits, net	152,653	79,965	0
Carrying Value \| Medium-term notes
Debt
Long-term debt, fair value	3,803,736	4,917,714	4,148,984
Carrying Value \| Senior notes
Debt
Long-term debt, fair value	744,149	743,977	743,466
Carrying Value \| Asset-backed U.S. commercial paper conduit facilities \| Secured Debt
Debt
Long-term debt, fair value	350,648	402,205	600,000
Carrying Value \| Asset-backed Canadian commercial paper conduit facility \| Secured Debt
Debt
Long-term debt, fair value	102,543	116,678	155,243
Carrying Value \| Asset-backed securitization debt \| Secured Debt
Debt
Long-term debt, fair value	2,099,258	1,791,956	1,156,845
Carrying Value \| Unsecured commercial paper
Debt
Unsecured commercial paper	749,801	1,014,274	1,335,664
Carrying Value \| U.S. Line of Credit
Debt
Unsecured commercial paper	$ 15,462	$ 0	$ 0

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- Definition

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

+ References

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=121572278&loc=d3e13433-108611

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- References

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- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

No definition available.

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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=120391452&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

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