Asset-Backed Financing - Additional Information (Details)	3 Months Ended							9 Months Ended
	Sep. 27, 2020 USD ($)	Jun. 28, 2020 USD ($)	Mar. 29, 2020 USD ($)	Sep. 29, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2016 USD ($)	Sep. 27, 2020 USD ($)	Sep. 29, 2019 USD ($)	Sep. 27, 2020 CAD ($)	Apr. 30, 2020 USD ($)	Nov. 30, 2019 USD ($)	Nov. 30, 2018 USD ($)
Variable Interest Entity
Proceeds from securitization debt								$ 2,064,450,000	$ 1,021,353,000
Servicing and ancillary fees								100,000	500,000
Unconsolidated VIEs
Variable Interest Entity
Principal balance of finance receivable							$ 301,800,000
Gain on sale of finance receivable							9,300,000
Cash proceeds from sale of financial asset							$ 312,600,000
Off-balance sheet asset-backed securitization VIE repurchase											$ 27,400,000
Secured Debt | Asset-backed U.S. commercial paper conduit facility VIE, facility one | Consolidated VIEs | U.S. Line of Credit
Variable Interest Entity
Line of credit, maximum borrowing capacity												$ 300,000,000.0	$ 300,000,000.0
Line of credit facility, remaining borrowing capacity													300,000,000.0
Secured Debt | Asset-backed U.S. commercial paper conduit facility VIE, facility two | Consolidated VIEs | U.S. Line of Credit
Variable Interest Entity
Line of credit, maximum borrowing capacity												$ 600,000,000.0	$ 600,000,000.0
Secured Debt | Asset-backed U.S. commercial paper conduit facilities | Consolidated VIEs | U.S. Line of Credit
Variable Interest Entity
Transfers on finance receivables	$ 0	$ 1,840,500,000	$ 580,200,000	$ 0	$ 1,120,000,000	$ 0		2,420,700,000	1,120,000,000
Proceeds	0	1,550,200,000	525,000,000	0	1,025,000,000	0		2,075,200,000	1,025,000,000
Proceeds, net	0	1,541,800,000	522,700,000	0	1,021,300,000	0		$ 2,064,500,000	1,021,300,000
Length of option								5 years
Amount transferred to receivables	0	0	195,300,000,000	174,400,000,000	0	0		$ 195,300,000,000	174,400,000,000
Proceeds from transfer of finance receivables	0	0	163,600,000,000	154,600,000,000	0	0		$ 163,600,000,000	154,600,000,000
Secured Debt | Asset-backed Canadian commercial paper conduit facility | Unconsolidated VIEs | 364-day credit facility borrowings
Variable Interest Entity
Line of credit, maximum borrowing capacity										$ 220,000,000.0
Length of option								4 years
Amount transferred to receivables	0	0	77,900,000,000	0	28,200,000	0		$ 77,900,000,000	28,200,000
Proceeds from transfer of finance receivables	0	$ 0	$ 61,600,000,000	$ 0	$ 23,400,000	$ 0		61,600,000,000	23,400,000
VIE, maximum loss exposure, amount	$ 95,500,000							95,500,000
Secured Debt | Asset-backed securitization 2 | Consolidated VIEs | Asset-backed Securities, Securitized Loans and Receivables
Variable Interest Entity
Proceeds from securitization debt								$ 0	$ 0