Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Principal Debt Outstanding

Debt consists of the following:

(In millions)	As of December 31, 2017
	Principal Outstanding		Unamortized Debt Issuance Costs			Unamortized Discount			Carrying Amount
Revolving secured line of credit (1)	$	13.9	$	—		$	—		$	13.9
Secured financing (2)	2,529.1		(15.0		)	—			2,514.1
Senior notes	550.0		(5.9		)	(1.3		)	542.8
Total debt	$	3,093.0	$	(20.9	)	$	(1.3	)	$	3,070.8
(In millions)	As of December 31, 2016
	Principal Outstanding		Unamortized Debt Issuance Costs			Unamortized Discount			Carrying Amount
Revolving secured line of credit (1)	$	—	$	—		$	—		$	—
Secured financing (2)	2,072.1		(9.7		)	—			2,062.4
Senior notes	550.0		(7.1		)	(1.6		)	541.3
Total debt	$	2,622.1	$	(16.8	)	$	(1.6	)	$	2,603.7

Schedule Of General Information Of Financing Transaction

General information for each of our financing transactions in place as of December 31, 2017 is as follows:

(Dollars in millions)
Financings	Wholly-owned Subsidiary	Maturity Date		Financing Amount			Interest Rate as of December 31, 2017
Revolving Secured Line of Credit	n/a	06/22/20		$	350.0	(1)	At our option, either LIBOR plus 187.5 basis points or the prime rate plus 87.5 basis points
Warehouse Facility II (2)	CAC Warehouse Funding Corp. II	12/20/20	(3)	$	400.0		LIBOR plus 175 basis points (4)
Warehouse Facility IV (2)	CAC Warehouse Funding LLC IV	04/30/20	(3)	$	100.0		LIBOR plus 225 basis points (4)
Warehouse Facility V (2)	CAC Warehouse Funding LLC V	08/18/19	(5)	$	100.0		LIBOR plus 225 basis points (4)
Warehouse Facility VI (2)	CAC Warehouse Funding LLC VI	09/30/20	(3)	$	75.0		LIBOR plus 200 basis points
Warehouse Facility VII (2)	CAC Warehouse Funding LLC VII	12/01/19	(6)	$	150.0		Commercial paper rate plus 190 basis points for class A and plus 220 basis points for class B (4)
Term ABS 2015-1 (2)	Credit Acceptance Funding LLC 2015-1	01/16/17	(3)	$	300.6		Fixed rate
Term ABS 2015-2 (2)	Credit Acceptance Funding LLC 2015-2	08/15/17	(3)	$	300.2		Fixed rate
Term ABS 2016-1 (2)	Credit Acceptance Funding LLC 2016-1	02/15/18	(3)	$	385.0		LIBOR plus 195 basis points (4)
Term ABS 2016-2 (2)	Credit Acceptance Funding LLC 2016-2	05/15/18	(3)	$	350.2		Fixed rate
Term ABS 2016-3 (2)	Credit Acceptance Funding LLC 2016-3	10/15/18	(3)	$	350.0		Fixed rate
Term ABS 2017-1 (2)	Credit Acceptance Funding LLC 2017-1	02/15/19	(3)	$	350.0		Fixed rate
Term ABS 2017-2 (2)	Credit Acceptance Funding LLC 2017-2	06/17/19	(3)	$	450.0		Fixed rate
Term ABS 2017-3 (2)	Credit Acceptance Funding LLC 2017-3	10/15/19	(3)	$	350.0		Fixed rate
2021 Senior Notes	n/a	02/15/21		$	300.0		Fixed rate
2023 Senior Notes	n/a	03/15/23		$	250.0		Fixed rate

(1) The amount of the facility will decrease to $315.0 million on June 22, 2019.

(2) Financing made available only to a specified subsidiary of the Company.

(3) Represents the revolving maturity date. The outstanding balance will amortize after the revolving maturity date based on the cash flows of the pledged assets.

(4) Interest rate cap agreements are in place to limit the exposure to increasing interest rates.

(5) Represents the revolving maturity date. The outstanding balance will amortize after the revolving maturity date and any amounts remaining on August 18, 2021 will be due on that date.

Schedule Of Additional Information Related To Debt Instruments

Additional information related to the amounts outstanding on each facility is as follows:

(In millions)	For the Years Ended December 31,
	2017		2016
Revolving Secured Line of Credit
Maximum outstanding principal balance	$	276.7	$	186.4
Average outstanding principal balance	80.3		30.8
Warehouse Facility II
Maximum outstanding principal balance	$	275.0	$	200.1
Average outstanding principal balance	4.0		3.8
Warehouse Facility IV
Maximum outstanding principal balance	$	12.0	$	12.0
Average outstanding principal balance	5.9		12.0
Warehouse Facility V
Maximum outstanding principal balance	$	100.0	$	100.0
Average outstanding principal balance	7.8		1.6
Warehouse Facility VI
Maximum outstanding principal balance	$	75.0	$	49.9
Average outstanding principal balance	7.8		3.3
Warehouse Facility VII
Maximum outstanding principal balance	$	—	$	—
Average outstanding principal balance	—		—

Summary Of Debt

(Dollars in millions)	As of December 31,
	2017			2016
Revolving Secured Line of Credit
Principal balance outstanding	$	13.9		$	—
Amount available for borrowing (1)	336.1			310.0
Interest rate	3.44		%	—		%
Warehouse Facility II
Principal balance outstanding	$	—		$	—
Amount available for borrowing  (1)	400.0			400.0
Loans pledged as collateral	—			—
Restricted cash and cash equivalents pledged as collateral	1.0			1.5
Interest rate	—		%	—		%
Warehouse Facility IV
Principal balance outstanding	$	—		$	12.0
Amount available for borrowing (1)	100.0			63.0
Loans pledged as collateral	—			23.0
Restricted cash and cash equivalents pledged as collateral	1.0			0.9
Interest rate	—		%	2.77		%
Warehouse Facility V
Principal balance outstanding	$	—		$	—
Amount available for borrowing (1)	100.0			100.0
Loans pledged as collateral	—			—
Restricted cash and cash equivalents pledged as collateral	1.0			1.0
Interest rate	—		%	—		%
Warehouse Facility VI
Principal balance outstanding	$	—		$	—
Amount available for borrowing (1)	75.0			75.0
Loans pledged as collateral	—			—
Restricted cash and cash equivalents pledged as collateral	—			0.1
Interest rate	—		%	—		%
Warehouse Facility VII
Principal balance outstanding	$	—		$	—
Amount available for borrowing (1)	150.0			—
Loans pledged as collateral	—			—
Restricted cash and cash equivalents pledged as collateral	1.0			—
Interest rate	—		%	—		%
Term ABS 2014-1
Principal balance outstanding	$	—		$	106.5
Loans pledged as collateral	—			307.2
Restricted cash and cash equivalents pledged as collateral	—			28.3
Interest rate	—		%	2.02		%
Term ABS 2014-2
Principal balance outstanding	$	—		$	267.6
Loans pledged as collateral	—			413.9
Restricted cash and cash equivalents pledged as collateral	—			34.9
Interest rate	—		%	2.10		%

Term ABS 2015-1
Principal balance outstanding	$	78.0		$	300.6
Loans pledged as collateral	238.4			374.5
Restricted cash and cash equivalents pledged as collateral	23.3			29.6
Interest rate	2.88		%	2.26		%
Term ABS 2015-2
Principal balance outstanding	$	215.9		$	300.2
Loans pledged as collateral	313.3			372.6
Restricted cash and cash equivalents pledged as collateral	26.4			28.1
Interest rate	2.72		%	2.63		%
Term ABS 2016-1
Principal balance outstanding	$	385.0		$	385.0
Loans pledged as collateral	467.2			474.0
Restricted cash and cash equivalents pledged as collateral	36.6			34.8
Interest rate	3.18		%	2.65		%
Term ABS 2016-2
Principal balance outstanding	$	350.2		$	350.2
Loans pledged as collateral	428.0			490.7
Restricted cash and cash equivalents pledged as collateral	33.2			34.4
Interest rate	2.83		%	2.83		%
Term ABS 2016-3
Principal balance outstanding	$	350.0		$	350.0
Loans pledged as collateral	425.7			489.6
Restricted cash and cash equivalents pledged as collateral	31.1			30.6
Interest rate	2.53		%	2.53		%
Term ABS 2017-1
Principal balance outstanding	$	350.0		$	—
Loans pledged as collateral	425.9			—
Restricted cash and cash equivalents pledged as collateral	30.8			—
Interest rate	2.78		%	—		%
Term ABS 2017-2
Principal balance outstanding	$	450.0		$	—
Loans pledged as collateral	545.8			—
Restricted cash and cash equivalents pledged as collateral	39.8			—
Interest rate	2.72		%	—		%
Term ABS 2017-3
Principal balance outstanding	$	350.0		$	—
Loans pledged as collateral	482.6			—
Restricted cash and cash equivalents pledged as collateral	29.6			—
Interest rate	2.88		%	—		%
2021 Senior Notes
Principal balance outstanding	$	300.0		$	300.0
Interest rate	6.125		%	6.125		%
2023 Senior Notes
Principal balance outstanding	$	250.0		$	250.0
Interest rate	7.375		%	7.375		%

(1) Availability may be limited by the amount of assets pledged as collateral.

Summary of Term ABS Debt

The table below sets forth certain additional details regarding the outstanding Term ABS Financings:

(Dollars in millions)
Term ABS Financings	Close Date	Net Book Value of Loans Contributed at Closing		24 Month Revolving Period
Term ABS 2015-1	January 29, 2015	$	375.9	Through January 16, 2017
Term ABS 2015-2	August 20, 2015	375.5		Through August 15, 2017
Term ABS 2016-1	February 26, 2016	481.4		Through February 15, 2018
Term ABS 2016-2	May 12, 2016	437.8		Through May 15, 2018
Term ABS 2016-3	October 27, 2016	437.8		Through October 15, 2018
Term ABS 2017-1	February 23, 2017	437.8		Through February 15, 2019
Term ABS 2017-2	June 29, 2017	563.2		Through June 17, 2019
Term ABS 2017-3	October 26, 2017	437.6		Through October 15, 2019

Scheduled Principal Maturities Of Debt

The scheduled principal maturities of our debt as of December 31, 2017 are as follows:

(In millions)
Year	Revolving Secured Line of Credit Facility		Warehouse Facilities		Term ABS Financings (1)		Senior Notes		Total
2018	$	—	$	—	$	800.1	$	—	$	800.1
2019	—		—		1,015.6		—		1,015.6
2020	13.9		—		690.0		—		703.9
2021	—		—		23.4		300.0		323.4
2022	—		—		—		—		—
Thereafter	—		—		—		250.0		250.0
Total	$	13.9	$	—	$	2,529.1	$	550.0	$	3,093.0

(1) The principal maturities of the Term ABS transactions are estimated based on forecasted collections.