Debt (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Schedule of Principal Debt Outstanding

Debt consists of the following:

(In millions)	As of June 30, 2017
	Principal Outstanding		Unamortized Debt Issuance Costs			Unamortized Discount			Carrying Amount
Secured financing (1)	$	2,485.2	$	(12.9	)	$	—		$	2,472.3
Senior notes	550.0		(6.5		)	(1.4		)	542.1
Total debt	$	3,035.2	$	(19.4	)	$	(1.4	)	$	3,014.4
(In millions)	As of December 31, 2016
	Principal Outstanding		Unamortized Debt Issuance Costs			Unamortized Discount			Carrying Amount
Secured financing (1)	$	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

(1) Warehouse facilities and Term ABS.

Schedule of General Information of Financing Transaction

(Dollars in millions)
Financings	Wholly-owned Subsidiary	Maturity Date		Financing Amount			Interest Rate as of    June 30, 2017
Revolving Secured Line of Credit	n/a	06/22/2020		$	345.0	(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	06/23/2019	(4)	$	400.0		LIBOR plus 225 basis points (3)
Warehouse Facility IV (2)	CAC Warehouse Funding LLC IV	04/30/2020	(4)	$	100.0		LIBOR plus 225 basis points (3)
Warehouse Facility V (2)	CAC Warehouse Funding LLC V	08/18/2019	(5)	$	100.0		LIBOR plus 225 basis points (3)
Warehouse Facility VI (2)	CAC Warehouse Funding LLC VI	09/30/2018	(4)	$	75.0		LIBOR plus 200 basis points
Term ABS 2014-2 (2)	Credit Acceptance Funding LLC 2014-2	09/15/2016	(4)	$	349.0		Fixed rate
Term ABS 2015-1 (2)	Credit Acceptance Funding LLC 2015-1	01/16/2017	(4)	$	300.6		Fixed rate
Term ABS 2015-2 (2)	Credit Acceptance Funding LLC 2015-2	08/15/2017	(4)	$	300.2		Fixed rate
Term ABS 2016-1 (2)	Credit Acceptance Funding LLC 2016-1	02/15/2018	(4)	$	385.0		LIBOR plus 195 basis points (3)
Term ABS 2016-2 (2)	Credit Acceptance Funding LLC 2016-2	05/15/2018	(4)	$	350.2		Fixed rate
Term ABS 2016-3 (2)	Credit Acceptance Funding LLC 2016-3	10/15/2018	(4)	$	350.0		Fixed rate
Term ABS 2017-1 (2)	Credit Acceptance Funding LLC 2017-1	02/15/2019	(4)	$	350.0		Fixed rate
Term ABS 2017-2 (2)	Credit Acceptance Funding LLC 2017-2	06/17/2019	(4)	$	450.0		Fixed rate
2021 Senior Notes	n/a	02/15/2021		$	300.0		Fixed rate
2023 Senior Notes	n/a	03/15/2023		$	250.0		Fixed rate

(1) The amount of the facility will decrease to $300.0 million on June 22, 2019.

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

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

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

(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 Three Months Ended   June 30,				For the Six Months Ended   June 30,
	2017		2016		2017		2016
Revolving Secured Line of Credit
Maximum outstanding principal balance	$	276.7	$	123.7	$	276.7	$	186.4
Average outstanding principal balance	178.8		22.2		120.9		39.4
Warehouse Facility II
Maximum outstanding principal balance	$	263.4	$	200.1	$	263.4	$	200.1
Average outstanding principal balance	5.8		6.6		5.1		5.5
Warehouse Facility IV
Maximum outstanding principal balance	$	12.0	$	12.0	$	12.0	$	12.0
Average outstanding principal balance	11.6		12.0		11.8		12.0
Warehouse Facility V
Maximum outstanding principal balance	$	100.0	$	100.0	$	100.0	$	100.0
Average outstanding principal balance	28.9		3.3		15.6		2.1
Warehouse Facility VI
Maximum outstanding principal balance	$	75.0	$	49.9	$	75.0	$	49.9
Average outstanding principal balance	28.4		1.6		14.8		6.0

Summary of Debt

(Dollars in millions)	As of
	June 30, 2017			December 31, 2016
Revolving Secured Line of Credit
Principal balance outstanding	$	—		$	—
Amount available for borrowing (1)	345.0			310.0
Interest rate	—		%	—		%
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	2.7			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	0.1			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	1.1			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	0.8			0.1
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	$	112.7		$	267.6
Loans pledged as collateral	328.0			413.9
Restricted cash and cash equivalents pledged as collateral	33.6			34.9
Interest rate	2.41		%	2.10		%
Term ABS 2015-1
Principal balance outstanding	$	187.1		$	300.6
Loans pledged as collateral	305.4			374.5
Restricted cash and cash equivalents pledged as collateral	29.4			29.6
Interest rate	2.41		%	2.26		%

Term ABS 2015-2
Principal balance outstanding	$	300.2		$	300.2
Loans pledged as collateral	364.4			372.6
Restricted cash and cash equivalents pledged as collateral	31.3			28.1
Interest rate	2.63		%	2.63		%
Term ABS 2016-1
Principal balance outstanding	$	385.0		$	385.0
Loans pledged as collateral	463.3			474.0
Restricted cash and cash equivalents pledged as collateral	39.1			34.8
Interest rate	3.11		%	2.65		%
Term ABS 2016-2
Principal balance outstanding	$	350.2		$	350.2
Loans pledged as collateral	422.1			490.7
Restricted cash and cash equivalents pledged as collateral	35.3			34.4
Interest rate	2.83		%	2.83		%
Term ABS 2016-3
Principal balance outstanding	$	350.0		$	350.0
Loans pledged as collateral	448.4			489.6
Restricted cash and cash equivalents pledged as collateral	34.4			30.6
Interest rate	2.53		%	2.53		%
Term ABS 2017-1
Principal balance outstanding	$	350.0		$	—
Loans pledged as collateral	456.3			—
Restricted cash and cash equivalents pledged as collateral	34.2			—
Interest rate	2.78		%	—		%
Term ABS 2017-2
Principal balance outstanding	$	450.0		$	—
Loans pledged as collateral	572.9			—
Restricted cash and cash equivalents pledged as collateral	71.3			—
Interest rate	2.72		%	—		%
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 Financings

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 2014-2	September 25, 2014	$	437.6	Through September 15, 2016
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