Paccar Financial 10-K 26 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	ck0000731288
Entity Registrant Name	PACCAR FINANCIAL CORP
Entity Central Index Key	731288
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		145,000
Entity Public Float			$0

Statements_of_Income

Statements of Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Interest and fee income	$215.60	$206.50	$198.50
Operating lease and rental revenues	324.6	294.3	258.6
Used truck sales and other revenues	23.3	44.2	53.4
TOTAL INTEREST AND OTHER REVENUES	563.5	545	510.5
Interest and other borrowing costs	60.3	65.2	63.7
Depreciation and other rental expenses	262.8	237.9	211.6
Cost of used truck sales and other expenses	15.2	37.5	49.7
Selling, general and administrative expenses	44.9	42.7	42.8
Provision for losses on receivables	5.3	2.3	9.1
TOTAL EXPENSES	388.5	385.6	376.9
INCOME BEFORE INCOME TAXES	175	159.4	133.6
Income taxes	66.4	60.2	49.9
NET INCOME	$108.60	$99.20	$83.70

Statements_of_Comprehensive_In

Statements of Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$108.60	$99.20	$83.70
Unrealized losses on derivative contracts
Losses arising during the period	-7.4		-9.5
Tax effect	2.7		3.5
Reclassification adjustment	9.9	8	9.9
Tax effect	-3.7	-3	-3.7
Net other comprehensive income	1.5	5	0.2
TOTAL COMPREHENSIVE INCOME	$110.10	$104.20	$83.90

Balance_Sheets

Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
ASSETS
Cash	$42.90	$33.50
Finance and other receivables, net of allowance for losses (2014 - $56.0 and 2013 - $55.3)	4,996.60	4,528.10
Due from PACCAR and affiliates	1,288.90	1,367.30
Equipment on operating leases, net of accumulated depreciation (2014 - $479.0 and 2013 - $455.8)	1,274.40	1,188.50
Other assets	183.1	130.2
TOTAL ASSETS	7,785.90	7,247.60
LIABILITIES
Accounts payable, accrued expenses and other	235.4	211.2
Due to PACCAR and affiliates	57.2	259.4
Commercial paper	1,500.60	1,149.80
Medium-term notes	4,149.50	3,849.90
Deferred taxes and other liabilities	783.4	832.3
TOTAL LIABILITIES	6,726.10	6,302.60
STOCKHOLDER'S EQUITY
Preferred stock, par value $100 per share, 6% noncumulative and nonvoting, 450,000 shares authorized, 310,000 shares issued and outstanding	31	31
Common Stock, par value $100 per share, 200,000 shares authorized, 145,000 shares issued and outstanding	14.5	14.5
Additional paid-in capital	112.3	107.6
Retained earnings	903.2	794.6
Accumulated other comprehensive loss	-1.2	-2.7
TOTAL STOCKHOLDER'S EQUITY	1,059.80	945
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$7,785.90	$7,247.60

Balance_Sheets_Parenthetical

Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Finance and other receivables, allowance for losses	$56	$55.30
Equipment on operating leases, accumulated depreciation	$479	$455.80
Preferred stock, par value	$100	$100
Preferred stock, noncumulative and nonvoting	6.00%	6.00%
Preferred stock, shares authorized	450,000	450,000
Preferred stock, shares issued	310,000	310,000
Preferred stock, shares outstanding	310,000	310,000
Common Stock, par value	$100	$100
Common Stock, shares authorized	200,000	200,000
Common Stock, shares issued	145,000	145,000
Common Stock, shares outstanding	145,000	145,000

Statements_of_Cash_Flows

Statements of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net income	$108.60	$99.20	$83.70
Items included in net income not affecting cash:
Depreciation and amortization	242.4	215.3	186.7
Provision for losses on receivables	5.3	2.3	9.1
Deferred taxes	-37.9	71.8	46.1
Administrative fees for services from PACCAR	4.7	2.9	3
Decrease (increase) in tax-related balances with PACCAR	205.5	-12.7	-19.9
(Decrease) increase in payables and other	-1.2	47.9	-55.7
NET CASH PROVIDED BY OPERATING ACTIVITIES	527.4	426.7	253
INVESTING ACTIVITIES
Finance and other receivables originated	-1,967.30	-1,834.70	-2,061.10
Collections on finance and other receivables	1,638.30	1,487.10	1,417.70
Net (increase) decrease in wholesale receivables	-165.4	63.7	-65.2
Loans to PACCAR and affiliates	-180	-395.5	-466
Collections on loans from PACCAR and affiliates	45	220.5	44
Net decrease (increase) in other receivables and leases to PACCAR and affiliates	20	-128.6	22.6
Acquisition of equipment on operating leases, primarily from PACCAR	-488.9	-457.8	-463.2
Proceeds from disposal of equipment	171.1	135.3	104.7
Changes in restricted cash			15
Other	-23.6	10	-0.7
NET CASH USED IN INVESTING ACTIVITIES	-950.8	-900	-1,452.20
FINANCING ACTIVITIES
Net increase (decrease) in commercial paper	350.8	-669.8	40.4
Proceeds from medium-term notes	1,100	1,700	1,599.20
Payments of medium-term notes	-800	-550	-250
Payments on loans from PACCAR	-218		-197
NET CASH PROVIDED BY FINANCING ACTIVITIES	432.8	480.2	1,192.60
NET INCREASE (DECREASE) IN CASH	9.4	6.9	-6.6
CASH AT BEGINNING OF YEAR	33.5	26.6	33.2
CASH AT END OF YEAR	$42.90	$33.50	$26.60

Statements_of_Stockholders_Equ

Statements of Stockholder's Equity (USD $)	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
In Millions
Balance at Dec. 31, 2011		$31	$14.50	$101.70	$611.70	($7.90)
Investments from PACCAR				3
Net income	83.7				83.7
Net unrealized gain						0.2
Balance at Dec. 31, 2012	837.9	31	14.5	104.7	695.4	-7.7
Investments from PACCAR				2.9
Net income	99.2				99.2
Net unrealized gain						5
Balance at Dec. 31, 2013	945	31	14.5	107.6	794.6	-2.7
Investments from PACCAR				4.7
Net income	108.6				108.6
Net unrealized gain						1.5
Balance at Dec. 31, 2014	$1,059.80	$31	$14.50	$112.30	$903.20	($1.20)

Statements_of_Stockholders_Equ1

Statements of Stockholder's Equity (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Preferred stock, par value	$100	$100	$100
Common Stock, par value	$100	$100	$100

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Significant Accounting Policies	NOTE A – SIGNIFICANT ACCOUNTING POLICIES
	Description of Operations and Basis of Presentation:
	PACCAR Financial Corp. (the “Company”), is a wholly-owned subsidiary of PACCAR Inc (“PACCAR”). The Company primarily provides financing of PACCAR manufactured trucks and related equipment sold by authorized dealers. The Company also finances dealer inventories of transportation equipment and franchises Kenworth and Peterbilt dealerships to engage in full-service and finance leasing. The operations of the Company are fundamentally affected by its relationship with PACCAR.
	Due to the nature of the Company’s business, customers are concentrated in the transportation industry throughout the United States. Generally, all receivables are collateralized by the equipment being financed. The risk of credit losses related to this concentration has been considered in establishing the allowance for losses.
	Use of Estimates:
	The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
	Finance and Other Receivables:
	Loans – Loans represent fixed or floating rate loans to customers or dealers collateralized by the vehicles purchased and are recorded at amortized cost.
	Finance leases – Finance leases are retail direct financing leases and sales-type finance leases, which lease equipment to retail customers and dealers. These leases are reported as the sum of minimum lease payments receivable and estimated residual value of the property subject to the contracts, reduced by unearned interest.
	Dealer wholesale financing – Dealer wholesale financing is floating rate wholesale loans to Kenworth and Peterbilt dealers for new and used trucks and are recorded at amortized cost. The loans are collateralized by the trucks being financed.
	Operating lease and other trade receivables – Operating lease and other trade receivables are monthly rentals due on operating leases, interest on loans and other amounts due within one year in the normal course of business.
	Allowance for Credit Losses:
	The Company continuously monitors the payment performance of its finance receivables. For large retail finance customers and dealers with wholesale financing, the Company regularly reviews their financial statements and makes site visits and phone contact as appropriate. If the Company becomes aware of circumstances that could cause those customers or dealers to face financial difficulty, whether or not they are past due, the customers are placed on a watch list.
	The Company modifies loans and finance leases as a normal part of its operations. The Company may modify loans and finance leases for commercial reasons or for credit reasons. Modifications for commercial reasons are changes to contract terms for customers that are not considered to be in financial difficulty. Insignificant delays are modifications extending terms up to three months for customers experiencing some short term financial stress but not considered to be in financial difficulty. Modifications for credit reasons are changes to contract terms for customers considered to be in financial difficulty. The Company’s modifications typically result in granting more time to pay the contractual amounts owed and charging a fee and interest for the term of the modification.
	On average, modifications extended contractual terms by four months in 2014 and 2013 and did not have a significant effect on the weighted average term or interest rate of the total portfolio at December 31, 2014 or 2013.
	When considering whether to modify customer accounts for credit reasons, the Company evaluates the creditworthiness of the customers and modifies those accounts that the Company considers likely to perform under the modified terms. When the Company modifies loans and finance leases for credit reasons and grants a concession, the modifications are classified as troubled debt restructurings (TDR). The Company does not typically grant credit modifications for customers that do not meet minimum underwriting standards since the Company normally repossesses the financed equipment in these circumstances. When such modifications do occur, they are considered TDRs.
	The Company has developed a systematic methodology for determining the allowance for credit losses for its two portfolio segments, retail and wholesale. The retail segment consists of retail loans and direct finance leases, net of unearned interest. The wholesale segment consists of truck inventory financing loans to dealers that are collateralized by trucks and other collateral. The wholesale segment generally has less risk than the retail segment. Wholesale receivables generally are shorter in duration than retail receivables, and the Company requires monthly reporting of the wholesale dealer’s financial condition, conducts periodic audits of the trucks being financed and, in many cases, obtains personal guarantees or other security such as dealership assets. In determining the allowance for credit losses, retail loans and finance leases are evaluated together since they relate to a similar customer base, their contractual terms require regular payment of principal and interest, generally over 36 to 60 months, and they are secured by the same type of collateral. The allowance for credit losses consists of both specific and general reserves.
	The Company individually evaluates certain finance receivables for impairment. Finance receivables that are evaluated individually for impairment consist of all wholesale accounts and certain large retail accounts with past due balances or otherwise determined to be at a higher risk of loss. A finance receivable is impaired if it is considered probable the Company will be unable to collect all contractual interest and principal payments as scheduled. In addition, all retail loans and leases which have been classified as TDRs and all customer accounts over 90-days past due are considered impaired. Generally, impaired accounts are on non-accrual status. Impaired accounts classified as TDRs which have been performing for 90 consecutive days are placed on accrual status if it is deemed probable that the Company will collect all principal and interest payments.
	Impaired receivables are generally considered collateral dependent. Large balance retail and all wholesale impaired receivables are individually evaluated to determine the appropriate reserve for losses. The determination of reserves for large balance impaired receivables considers the fair value of the associated collateral. When the underlying collateral fair value exceeds the Company’s recorded investment, no reserve is recorded. Small balance impaired receivables with similar risk characteristics are evaluated as a separate pool to determine the appropriate reserve for losses using the historical loss information discussed below.
	For finance receivables that are not individually impaired, the Company collectively evaluates and determines the general allowance for credit losses for both retail and wholesale receivables based on historical loss information, using past-due account data and current market conditions. Information used includes assumptions regarding the likelihood of collecting current and past-due accounts, repossession rates, the recovery rate on the underlying collateral based on used truck values and other pledged collateral or recourse.
	The Company has developed a range of loss estimates for its portfolio based on historical experience, taking into account loss frequency and severity in both strong and weak truck market conditions. A projection is made of the range of estimated credit losses inherent in the portfolio from which an amount is determined as probable based on current market conditions and other factors impacting the creditworthiness of the Company’s borrowers and their ability to repay. After determining the appropriate level of the allowance for credit losses, a provision for losses on finance receivables is charged to income as necessary to reflect management’s estimate of incurred credit losses, net of recoveries, inherent in the portfolio.
	In determining the fair value of the collateral, the Company uses a pricing matrix and categorizes the fair value as Level 2 in the hierarchy of fair value measurement. The pricing matrix is reviewed quarterly and updated as appropriate. The pricing matrix considers the make, model and year of the equipment as well as recent sales prices of comparable equipment through wholesale channels to the Company’s dealers (principal market). The fair value of the collateral also considers the overall condition of the equipment.
	Accounts are charged off against the allowance for credit losses when, in the judgment of management, they are considered uncollectible (generally upon repossession of the collateral). Typically the timing between the repossession and charge-off is not significant. In cases where repossession is delayed (e.g., for legal proceedings), the Company records partial charge-offs. The charge-off is determined by comparing the fair value of the collateral, less cost to sell, to the recorded investment.
	Revenue Recognition:
	Interest income from finance and other receivables is recognized using the interest method. Certain loan origination costs are deferred and amortized to interest income over the expected life of the contracts, generally 36 to 60 months, using the straight-line method which approximates the interest method. For operating leases, rental revenue is recognized on a straight-line basis over the lease term.
	Recognition of interest income and rental revenue is suspended (put on non-accrual status) when the receivable becomes more than 90 days past the contractual due date or earlier if some other event causes the Company to determine that collection is not probable. Accordingly, no finance receivables more than 90 days past due were accruing interest at December 31, 2014 or December 31, 2013. Recognition is resumed if the receivable becomes current by the payment of all amounts due under the terms of the existing contract and collection of remaining amounts is considered probable (if not contractually modified) or if the customer makes scheduled payments for three months and collection of remaining amounts is considered probable (if contractually modified). Payments received while the finance receivable is on non-accrual status are applied to interest and principal in accordance with the contractual terms.
	The Company recognizes revenue on the sale of used trucks acquired from PACCAR truck division customers as part of new truck sales packages when the used trucks are invoiced and delivered to a customer.
	Equipment on Operating Leases:
	Equipment on operating leases is recorded at cost and is depreciated on the straight-line basis to its estimated residual value. Residual values are reviewed regularly and adjusted if market conditions warrant.
	Restricted Cash:
	Restricted cash consists of cash proceeds from the sale of eligible assets set aside for the acquisition of replacement assets under the Company’s like-kind exchange tax program. The changes in restricted cash balances are reflected as an investing activity in the Statements of Cash Flows as they relate to sales and purchases of revenue earning assets.
	Derivative Financial Instruments:
	Derivative financial instruments are used to hedge exposures to fluctuations in interest rates. Certain derivative instruments designated as either cash flow hedges or fair value hedges are subject to hedge accounting. Derivative instruments that are not subject to hedge accounting are held as economic hedges. The Company’s policies prohibit the use of derivatives for speculation or trading. At the inception of each hedge relationship, the Company documents its risk management objectives, procedures and accounting treatment.
	All of the Company’s interest-rate contracts are transacted under International Swaps and Derivatives Association (ISDA) master agreements. Each agreement permits the net settlement of amounts owed in the event of default and certain other termination events. The Company has elected not to offset derivative positions in the balance sheet with the same counterparty under the same master netting agreements. The Company is not required to post or receive collateral under these agreements. Exposure limits and minimum credit ratings are used to minimize the risks of counterparty default. The Company had no material exposures to default at December 31, 2014.
	The Company uses regression analysis to assess effectiveness of interest-rate contracts on a quarterly basis. All components of the derivative instrument’s gain or loss are included in the assessment of hedge effectiveness. Gains or losses on the ineffective portion of cash flow hedges are recognized currently in earnings. Hedge accounting is discontinued prospectively when the Company determines that a derivative financial instrument has ceased to be a highly effective hedge.
	Income Taxes:
	The Company is included in the consolidated federal income tax return of PACCAR. Federal income taxes for the Company are determined on a separate return basis, and any related tax liability is paid by the Company to PACCAR and any related tax benefit is paid by PACCAR to the Company. State income taxes, where the Company files combined tax returns with PACCAR, are determined on a blended statutory rate, which is substantially the same as the rate computed on a separate return basis. As of December 31, 2014, the United States Internal Revenue Service has completed examinations of PACCAR’s tax returns for all years through 2010. PACCAR’s tax returns remain subject to examination in most jurisdictions for the years ranging from 2010 through 2014.
	Preferred Stock:
	The Company’s Articles of Incorporation provide that the 6%, noncumulative, nonvoting preferred stock (100% owned by PACCAR) is redeemable only at the option of the Company’s Board of Directors.
	New Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers. This ASU amends the existing accounting standards for revenue recognition. Under the new revenue recognition model, a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The ASU is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The amendment may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the transition alternatives and impact on the Company’s financial statements.
	In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward if available under the applicable tax jurisdiction. The ASU was effective for annual periods beginning after December 15, 2013 and interim periods within those annual periods. The Company adopted ASU 2013-11 in the first quarter of 2014; the implementation of this amendment did not have an impact on the Company’s financial statements.

Finance_and_Other_Receivables

Finance and Other Receivables	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Finance and Other Receivables	NOTE B – FINANCE AND OTHER RECEIVABLES
	The Company’s finance and other receivables are as follows:
			December 31			December 31
			2014			2013
	Retail loans		$	2,687.70		$	2,442.50
	Retail direct financing leases			1,699.80			1,577.00
	Dealer wholesale financing			743.4			578
	Dealer master notes			62.7			105.1
	Operating lease and other receivables			31.4			36.7
	Unearned interest on finance leases			(172.4	)		(155.9	)
				5,052.60			4,583.40
	Less allowance for losses:
	Loans and leases			(52.4	)		(51.5	)
	Dealer wholesale financing			(2.8	)		(3.0	)
	Operating lease and other trade receivables			(.8	)		(.8	)
			$	4,996.60		$	4,528.10
	Annual minimum payments due on loans and leases are as follows:
			Loans			Finance leases
	2015		$	779.3		$	396.4
	2016			690.4			392.8
	2017			585.6			333.7
	2018			398.8			240.8
	2019			249.8			171.6
	Thereafter			46.5			115.4
			$	2,750.40		$	1,650.70
	Estimated residual values included with finance leases amounted to $49.1 in 2014 and $51.4 in 2013. Experience indicates substantially all of dealer wholesale financing will be repaid within one year. In addition, collection experience indicates that some loans, leases and other finance receivables will be paid prior to contract maturity, while others may be extended or modified.
	For the following credit quality disclosures, finance receivables are classified into two portfolio segments, wholesale and retail. The retail portfolio is further segmented into dealer retail and customer retail. The dealer wholesale segment consists of truck inventory financing to PACCAR dealers. The dealer retail segment consists of loans and leases to participating dealers and franchises that use the proceeds to fund customers’ acquisition of commercial vehicles and related equipment. The customer retail segment consists of loans and leases directly to customers for the acquisition of commercial vehicles and related equipment. Customer retail receivables are further segregated between fleet and owner/operator classes. The fleet class consists of retail accounts of customers operating more than five trucks. All other customer retail accounts are considered owner/operator. These two classes have similar measurement attributes, risk characteristics and common methods to monitor and assess credit risk.
	Allowance for Credit Losses
	The allowance for credit losses is summarized as follows:
			2014
			Dealer						Customer
			Wholesale			Retail			Retail			Other*			Total
	Balance at January 1		$	3.0		$	11.5		$	40		$	0.8		$	55.3
	Provision for losses			(.2	)		(1.1	)		6.4			0.2			5.3
	Charge-offs									(5.9	)		(.2	)		(6.1	)
	Recoveries									1.5						1.5
	Balance at December 31		$	2.8		$	10.4		$	42.0		$	.8		$	56.0
			2013
			Dealer						Customer
			Wholesale			Retail			Retail			Other*			Total
	Balance at January 1		$	3.9		$	10.7		$	37.1		$	1.1		$	52.8
	Provision for losses			(.9	)		0.8			2.6			(.2	)		2.3
	Charge-offs									(6.4	)		(.1	)		(6.5	)
	Recoveries									6.7						6.7
	Balance at December 31		$	3		$	11.5		$	40		$	0.8		$	55.3
			2012
			Dealer						Customer
			Wholesale			Retail			Retail			Other*			Total
	Balance at January 1		$	3.4		$	9.9		$	44.4		$	1.1		$	58.8
	Provision for losses			0.5			0.8			7.6			0.2			9.1
	Charge-offs									(16.7	)		(.2	)		(16.9	)
	Recoveries									1.8						1.8
	Balance at December 31		$	3.9		$	10.7		$	37.1		$	1.1		$	52.8
	*	Operating lease and other trade receivables
	Information regarding finance receivables evaluated and determined collectively and individually is as follows:
			Dealer						Customer
	At December 31, 2014		Wholesale			Retail			Retail			Total
	Recorded investment for impaired finance receivables evaluated individually								$	24.7		$	24.7
	Allowance for impaired finance receivables determined individually								$	(1.7	)	$	(1.7	)
	Recorded investment for finance receivables evaluated collectively		$	743.4		$	1,404.70		$	2,848.40		$	4,996.50
	Allowance for finance receivables determined collectively		$	(2.8	)	$	(10.4	)	$	(40.3	)	$	(53.5	)
			Dealer						Customer
	At December 31, 2013		Wholesale			Retail			Retail			Total
	Recorded investment for impaired finance receivables evaluated individually								$	19.1		$	19.1
Allowance for impaired finance receivables determined individually								$	(2.0	)	$	(2.0	)
Recorded investment for finance receivables evaluated collectively		$	578		$	1,318.8		$	2,630.80		$	4,527.60
Allowance for finance receivables determined collectively		$	(3.0	)	$	(11.5	)	$	(38.0	)	$	(52.5	)
The recorded investment for finance receivables that are on non-accrual status is as follows:
		December 31			December 31
		2014			2013
Customer Retail:
Fleet		$	23		$	17
Owner/Operator			1.7			2.1
		$	24.7		$	19.1
Impaired Loans
Impaired loans with no specific reserve were $12.2 and $7.3 at December 31, 2014 and 2013, respectively. Impaired loans with a specific reserve are summarized below. The impaired loans with specific reserve represent the unpaid principal balance. The recorded investment of impaired loans as of December 31, 2014 and 2013 was not significantly different than the unpaid principal balance.
		Dealer			Customer Retail
								Owner/
At December 31, 2014		Wholesale		Retail	Fleet			Operator			Total
Impaired loans with specific reserve					$	8.3		$	1.6		$	9.9
Associated allowance						(.9	)		(.4	)		(1.3	)
Net carrying amount of impaired loans					$	7.4		$	1.2		$	8.6
Average recorded investment					$	16.5		$	1.6		$	18.1
		Dealer			Customer Retail
								Owner/
At December 31, 2013		Wholesale		Retail	Fleet			Operator			Total
Impaired loans with specific reserve					$	6.5		$	1.9		$	8.4
Associated allowance						(1.0	)		(.5	)		(1.5	)
Net carrying amount of impaired loans					$	5.5		$	1.4		$	6.9
Average recorded investment					$	13.6		$	3.1		$	16.7
During the period the loans above were considered impaired, interest income recognized on a cash basis was as follows:
		2014			2013			2012
Customer Retail:
Fleet		$	0.9		$	1.4		$	0.5
Owner/Operator			0.4			0.5			0.5
		$	1.3		$	1.9		$	1.0
Credit Quality
The Company’s customers are principally concentrated in the transportation industry in the United States. The Company’s portfolio assets are diversified over a large number of customers and dealers with no single customer or dealer balances representing over 10% of the total portfolio assets as of December 31, 2014 and 2013. The Company has contractual arrangements with one customer, Swift Transportation Corporation, that accounted for 14.4%, 11.4% and 10.8% of total Interest and other revenue for the years ended December 31, 2014, 2013 and 2012, respectively. The Company retains as collateral a security interest in the related equipment.
At the inception of each contract, the Company considers the credit risk based on a variety of credit quality factors including prior payment experience, customer financial information, credit-rating agency ratings, loan-to-value ratios and other internal metrics. On an ongoing basis, the Company monitors credit quality based on past-due status and collection experience as there is a meaningful correlation between the past-due status of customers and the risk of loss.
The Company has three credit quality indicators: performing, watch and at-risk. Performing accounts pay in accordance with the contractual terms and are not considered high risk. Watch accounts include accounts 31 to 90 days past-due and large accounts that are performing but are considered to be high-risk. Watch accounts are not impaired. At-risk accounts are accounts that are impaired, including TDRs, accounts over 90 days past-due and other accounts on non-accrual status.
The tables below summarize the Company’s finance receivables by credit quality indicator and portfolio class.
		Dealer						Customer Retail
											Owner/
At December 31, 2014		Wholesale			Retail			Fleet			Operator			Total
Performing		$	734.3		$	1,404.7		$	2,376.6		$	471.3		$	4,986.9
Watch			9.1						0.1			0.4			9.6
At-risk									23			1.7			24.7
Total		$	743.4		$	1,404.70		$	2,399.70		$	473.4		$	5,021.20
		Dealer						Customer Retail
											Owner/
At December 31, 2013		Wholesale			Retail			Fleet			Operator			Total
Performing		$	576.9		$	1,313.90		$	2,264.50		$	365.1		$	4,520.40
Watch			1.1			5			0.9			0.2			7.2
At-risk									17			2.1			19.1
Total		$	578		$	1,318.90		$	2,282.40		$	367.4		$	4,546.70
The tables below summarize the Company’s finance receivables by aging category. In determining past due status, the Company considers the entire contractual account balance past due when any installment is over 30 days past due. Substantially all customer accounts that were greater than 30 days past due prior to credit modification became current upon modification for aging purposes.
		Dealer						Customer Retail
											Owner/
At December 31, 2014		Wholesale			Retail			Fleet			Operator			Total
Current and up to 30 days past-due		$	743.4		$	1,404.70		$	2,398.10		$	472.5		$	5,018.70
31 – 60 days past-due									1						1
Greater than 60 days past-due									0.6			0.9			1.5
Total		$	743.4		$	1,404.70		$	2,399.70		$	473.4		$	5,021.20
		Dealer						Customer Retail
											Owner/
At December 31, 2013		Wholesale			Retail			Fleet			Operator			Total
Current and up to 30 days past-due		$	578		$	1,318.90		$	2,270.70		$	365.7		$	4,533.30
31 – 60 days past-due									1.4			0.5			1.9
Greater than 60 days past-due									10.3			1.2			11.5
Total		$	578		$	1,318.90		$	2,282.40		$	367.4		$	4,546.70
Troubled Debt Restructurings
The balance of TDRs was $20.6 and $6.1 at December 31, 2014 and 2013, respectively. At modification date, the pre- and post-modification recorded investment balances for finance receivables modified during the period by portfolio class are as follows:
		2014						2013
		Recorded Investment						Recorded Investment
		Pre-Modification			Post-Modification			Pre-Modification			Post-Modification
Fleet		$	22		$	22		$	2.3		$	2.3
Owner/Operator			0.3			0.3			0.3			0.3
		$	22.3		$	22.3		$	2.6		$	2.6
The increase in the post-modification recorded investment in 2014 primarily reflects a contract modification of one large customer. The effect on the allowance for credit losses from such modifications was not significant at December 31, 2014 and 2013.
The post-modification recorded investment of finance receivables modified as TDRs during the previous twelve months that subsequently defaulted (i.e. became more than 30 days past-due) during the period by portfolio class are as follows:
		Year ended December 31
		2014			2013
Fleet					$	0.2
Owner/Operator		$	0.1
		$	0.1		$	0.2
The TDRs that subsequently defaulted did not significantly impact the Company’s allowance for losses at December 31, 2014 and 2013.
Repossessions
When the Company determines that a customer is not likely to meet its contractual commitments, the Company repossesses the vehicles which serve as collateral for loans, finance leases and equipment under operating lease. The Company records the vehicles as used truck inventory which is included in Other assets on the Balance Sheets. The balance of repossessed inventory at December 31, 2014 and 2013 was $6.6 and $4.3, respectively. Proceeds from the sales of repossessed assets were $18.6, $19.5 and $11.3 for the years ended December 31, 2014, 2013 and 2012, respectively. These amounts are included in Proceeds from disposal of equipment on the Statements of Cash Flows. Write downs of repossessed equipment on operating leases are recorded as impairments and included in Depreciation and other rental expense on the Statements of Income.

Equipment_On_Operating_Leases

Equipment On Operating Leases	12 Months Ended
	Dec. 31, 2014
Leases, Operating [Abstract]
Equipment On Operating Leases	NOTE C – EQUIPMENT ON OPERATING LEASES
	Terms of operating leases at origination and the related depreciation, generally range from three to seven years. The total future annual minimum rental payments to be received for equipment on non-cancelable operating leases beginning January 1, 2015 of $636.0 are due as follows: $253.1 in 2015, $187.5 in 2016, $121.6 in 2017, $54.9 in 2018, and $18.9 in 2019 and thereafter. Depreciation expense related to equipment on operating leases was $231.0, $208.8 and $179.5 in 2014, 2013 and 2012, respectively. Substantially all equipment on operating leases is manufactured by PACCAR.

Transactions_with_PACCAR_and_A

Transactions with PACCAR and Affiliates	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Transactions with PACCAR and Affiliates	NOTE D – TRANSACTIONS WITH PACCAR AND AFFILIATES
	The Company and PACCAR are parties to a Support Agreement that obligates PACCAR to provide, when required, financial assistance to the Company to ensure that the Company maintains a ratio of net earnings available for fixed charges to fixed charges (as defined in the Support Agreement) of at least 1.25 to 1 for any fiscal year. The required ratio for the years ended December 31, 2014, 2013 and 2012 was met without assistance. The Support Agreement also requires PACCAR to own, directly or indirectly, all outstanding voting stock of the Company.
	Periodically, the Company makes loans to, borrows from and has intercompany transactions with PACCAR. In addition, the Company periodically loans funds to certain foreign finance and leasing affiliates of PACCAR. These various affiliates have Support Agreements with PACCAR, similar to the Company’s Support Agreement with PACCAR. The foreign affiliates operate in the United Kingdom, the Netherlands, Mexico, Canada and Australia, and any resulting currency exposure is fully hedged. The foreign affiliates primarily provide financing and leasing of PACCAR manufactured trucks and related equipment sold through the DAF, Kenworth,and Peterbilt independent dealer networks in Europe, Mexico, Canada and Australia. The Company will not make loans to the foreign affiliates in excess of the equivalent of $500.0 United States dollars, unless the amount in excess of such limit is guaranteed by PACCAR. The Company periodically reviews the funding alternatives for these affiliates, and these limits may be revised in the future.
	Loans due to PACCAR were nil and $218.0 at December 31, 2014 and 2013. The $218.0 loan, with an effective fixed interest rate of 6.88%, was repaid upon maturity in February 2014. The Company recognized interest expense of $1.8, $15.0 and $16.9 in 2014, 2013 and 2012, respectively, on the borrowings from PACCAR. Cash paid for interest on these borrowings was $7.5, $15.0 and $20.7 in 2014, 2013 and 2012, respectively.
	Amounts outstanding at December 31, 2014 and 2013, including foreign finance affiliates operating in the United Kingdom, the Netherlands, Mexico, Canada and Australia, are summarized below:
		December 31		December 31
		2014		2013
	Due from PACCAR and affiliates
	Loans due from PACCAR	$	830.5	$	653.6
	Loans due from foreign finance affiliates		361		429.6
	Direct financing leases due from affiliate		15.1		14.7
	Tax-related receivable due from PACCAR				193.7
	Receivables		82.3		75.7
	Total	$	1,288.90	$	1,367.30
	Due to PACCAR and affiliates
	Loans due to PACCAR			$	218
	Tax-related payable due to PACCAR	$	11.8
	Payables		45.4		41.4
	Total	$	57.2	$	259.4
	The Company is included in the consolidated federal income tax return of PACCAR. The tax-related receivable due from PACCAR and the tax-related payable due to PACCAR represent the related tax benefit or provision to be settled with PACCAR.
	The Company provides direct financing leases to dealer locations operated by an affiliate of PACCAR.
	PACCAR has issued letters of credit as of December 31, 2014 in the amount of $3.3 on behalf of the Company to guarantee funds for payment to insured franchisees and customers for any future insurance losses.
	PACCAR charges the Company for certain administrative services it provides. These costs were charged to the Company based upon the Company’s use of the services and PACCAR’s cost. Fees for the services were $4.7, $2.9 and $3.0 in 2014, 2013 and 2012, respectively, and are included in Additional paid-in capital.
	The Company’s principal office is located in the corporate headquarters building of PACCAR (owned by PACCAR). The Company also leases office space from another facility owned by PACCAR and five facilities leased by PACCAR.
	The Company’s employees and PACCAR employees are covered by a defined benefit pension plan sponsored by PACCAR. The assets and liabilities of the plan are reflected on the balance sheets of PACCAR. PACCAR contributes to the plan and allocates the expenses to the Company based principally on the number of eligible plan participants. Expenses for the defined benefit pension plan were $2.4, $2.9 and $2.7 for the years 2014, 2013 and 2012, respectively, and are included in Selling, general and administrative expenses.
	The Company’s employees and PACCAR employees are also covered by a defined contribution plan, sponsored by PACCAR. Expenses are based on the actual contribution made on the behalf of participating employees. Expenses incurred by the Company for the defined contribution plan were $1.1, $1.1 and $1.2 for the years 2014, 2013 and 2012, respectively, and are included in Selling, general and administrative expenses.

Stockholders_Equity

Stockholder's Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Stockholder's Equity	NOTE E – STOCKHOLDER’S EQUITY
	Accumulated other comprehensive loss (AOCL) of $1.2 and $2.7 at December 31, 2014 and 2013, respectively, is comprised of the unrealized net loss on derivative contracts, net of taxes. Changes in and reclassifications out of AOCL during 2014 and 2013 are as follows:
		2014			2013
	Balance at beginning of year	$	(2.7	)	$	(7.7	)
	Amounts recorded in AOCL
	Unrealized loss on derivative contracts		(7.4	)
	Income tax effect		2.7
	Amounts reclassified out of AOCL
	Interest and other borrowing costs		9.9			8
	Income taxes		(3.7	)		(3.0	)
	Net other comprehensive income		1.5			5
	Balance at end of year	$	(1.2	)	$	(2.7	)

Derivative_Financial_Instrumen

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	NOTE F – DERIVATIVE FINANCIAL INSTRUMENTS
	Interest rate contracts involve the exchange of fixed for floating rate or floating for fixed rate interest payments based on the contractual notional amounts in a single currency. The Company is exposed to interest rate risk caused by market volatility as a result of its borrowing activities. The objective of these contracts is to mitigate the fluctuations on earnings, cash flows and fair value of borrowings. Net amounts paid or received are reflected as adjustments to interest expense. The notional amount is used to measure the volume of these contracts and does not represent exposure to credit loss. In the event of default by the counterparty, the risk in these transactions is the fair value of replacing the interest rate contract at current market rates.
	At December 31, 2014, the notional amount of these contracts totaled $1,147.0 with amounts expiring over the next six years. Notional maturities for all interest rate contracts are $325.0 for 2015, $392.0 for 2016, $100.0 for 2017, $250.0 for 2018, $40.0 for 2019 and $40.0 for 2020. The majority of these contracts are floating to fixed rate swaps that effectively convert an equivalent amount of commercial paper and other variable rate debt to fixed rates.
	The following table presents the balance sheet classification, fair value and gross and net amounts of derivative financial instruments:
	At December 31, 2014
	Interest-rate contracts	Gross Amount			Amount Not Offset			Pro Forma Net
		Recognized  in			in Financial			Amount
		Balance Sheets			Instruments
	Assets:
	Other assets	$	0.9		$	(.4	)	$	0.5
	Liabilities
	Accounts payable, accrued expenses and other	$	3.6		$	(.4	)	$	3.2
	At December 31, 2013
	Interest-rate contracts	Gross Amount			Amount Not Offset			Pro Forma Net
		Recognized in			in Financial			Amount
		Balance Sheets			Instruments
	Assets:
	Other assets	$	1.6		$	(.2	)	$	1.4
	Liabilities
	Accounts payable, accrued expenses and other	$	6		$	(.2	)	$	5.8
	Cash Flow Hedges
	Substantially all of the Company’s interest rate contracts have been designated as cash flow hedges. The Company uses regression analysis to assess the effectiveness of hedges. The change in variable cash flows method or the hypothetical derivative method is used to measure ineffectiveness of interest rate contracts designated as cash flow hedges. Changes in the fair value of derivatives designated as cash flow hedges are recorded in AOCL to the extent such hedges are considered effective. Gains or losses on the ineffective portion of cash flow hedges are recognized in current earnings and were immaterial for the years ended December 31, 2014, 2013 and 2012. The maximum length of time over which the Company is hedging its exposure to the variability in future cash flows is 5.8 years.
	Amounts in AOCL are reclassified into net income in the same period in which the hedged transaction affects earnings. Net realized gains and losses from interest rate contracts are recognized as an adjustment to interest expense. As of December 31, 2014, AOCL was $1.2, net of tax, and $3.5, net of tax, is expected to be reclassified to interest expense in the following 12 months. The fixed interest earned on finance receivables will offset the amount recognized in interest expense, resulting in a stable interest margin consistent with the Company’s interest rate risk management strategy.
	The following table presents the pre-tax effects of derivative instruments designated as cash flow hedges recognized in other comprehensive income (OCI) and expenses reclassified from AOCL into income.
		Year ended December 31
		2014			2013			2012
	Pre-tax loss on derivative contracts recognized in OCI	$	(7.4	)				$	(9.5	)
	Expenses reclassified from AOCL into
	Interest and other borrowing expenses	$	9.9		$	8		$	9.9
	Fair Value Hedges
	Changes in the fair value of derivatives designated as fair value hedges are recorded in earnings together with the changes in fair value of the hedged item attributable to the risk being hedged. The expense or (income) recognized in earnings related to fair value hedges was included in Interest and other borrowing costs in the Statements of Income as follows:
		Year ended December 31
		2014		2013	2012
	Interest-rate swaps				$	(2.3	)
	Term notes				$	2.1
	In addition, the net interest income from the settlement of the interest-rate swaps was nil, nil and $.9 for the years ended December 31, 2014, 2013 and 2012, respectively, and is included in Interest and other borrowing costs in the Statements of Income.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Borrowings	NOTE G – BORROWINGS
	Borrowings are summarized as follows:
		2014				2013
		Effective		Borrowings		Effective		Borrowings
		Rate				Rate
	Commercial paper		0.40%	$	1,500.60		0.60%	$	1,149.80
	Fixed rate medium-term notes		1.18%		3,249.50		1.10%		2,749.90
	Floating rate medium-term notes		1.10%		900		0.81%		1,100.00
			0.96%	$	5,650.10		0.93%	$	4,999.70
	The fixed rate medium-term notes of $3,249.5 at December 31, 2014 include a decrease in fair value of $.5 for notes designated as fair value hedged items. The fixed rate medium-term notes of $2,749.9 at December 31, 2013 include a decrease in fair value of $.1 for notes designated as fair value hedged items. The effective rate is the weighted average rate as of December 31, 2014 and includes the effects of interest rate swap agreements.
	The annual principal maturities of the borrowings are as follows:
		Commercial		Term		Total
		Paper		Notes
	2015	$	1,500.60	$	1,050.00	$	2,550.60
	2016				1,250.00		1,250.00
	2017				1,300.00		1,300.00
	2018				250		250
	2019				300		300
		$	1,500.60	$	4,150.00	$	5,650.60
	Interest expense on borrowings amounted to $51.8, $44.2, and $42.3 for 2014, 2013 and 2012, respectively. Interest paid on borrowings was $50.7, $40.8, and $39.0 in 2014, 2013 and 2012, respectively.
	In November 2012, the Company filed a shelf registration statement under the Securities Act of 1933. The registration expires in November 2015 and does not limit the principal amount of debt securities that may be issued during the period. The total notional amount of medium-term notes outstanding as of December 31, 2014 was $4,150.0.
	See “Note D – Transactions with PACCAR and Affiliates” for discussion of borrowings from PACCAR.

Credit_Arrangements

Credit Arrangements	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Credit Arrangements	NOTE H – CREDIT ARRANGEMENTS
	The Company participated with PACCAR and certain other PACCAR affiliates in syndicated credit facilities of $3,000.0 at December 31, 2014. Of this amount, $1,000.0 expires in June 2015, $1,000.0 expires in 2018 and $1,000.0 expires in 2019. PACCAR and the Company intend to replace these credit facilities as they expire with facilities of similar amounts.
	Of the $3,000.0 credit facilities, $1,916.5 is available for use by the Company and/or PACCAR and PACCAR Financial Europe. The remaining $1,083.5 is allocated to other non-U.S. PACCAR financial subsidiaries. These credit facilities are used to provide backup liquidity for the Company’s commercial paper and maturing medium-term notes. The Company is liable only for its own borrowings under these credit facilities. There were no borrowings under these credit facilities in the years ended December 31, 2014 and 2013.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	NOTE I – INCOME TAXES
	The Company’s effective income tax rate was 37.9% for 2014 compared to 37.8% for 2013.
	The Company is included in the consolidated federal income tax return of PACCAR. Federal income taxes for the Company are determined on a separate return basis. State income taxes, where the Company files combined tax returns with PACCAR, are determined on a blended statutory rate, which is substantially the same as the rate computed on a separate return basis.
	The provision for income taxes consisted of the following:
		Year ended December 31
		2014			2013			2012
	Current provision (benefit)
	Federal	$	102.8		$	(9.7	)	$	(1.4	)
	State		1.5			(1.9	)		5.2
			104.3			(11.6	)		3.8
	Deferred (benefit) provision
	Federal		(44.3	)		60.9			42.9
	State		6.4			10.9			3.2
			(37.9	)		71.8			46.1
	Total provision for income taxes	$	66.4		$	60.2		$	49.9
	A reconciliation between the statutory federal income tax rate to the actual provision for income taxes is shown below:
		Year ended December 31
		2014			2013			2012
	Statutory rate		35.00%			35.00%			35.00%
	Effect of:
	State		3.00%			3.50%			1.90%
	Other		-0.10%			-0.70%			0.50%
			37.90%			37.80%			37.40%
	Cash paid for income taxes was $3.7, $4.1, and $2.2 in 2014, 2013 and 2012, respectively.
	The tax effects of temporary differences representing deferred tax assets and liabilities are as follows:
		December 31			December 31
		2014			2013
	Deferred tax assets:
	Allowance for losses on receivables	$	21.3		$	21.1
	Derivative liability		1			2.2
	Other		8.1			9.6
	Deferred tax liabilities:
	Asset capitalization and depreciation		(796.3	)		(835.8	)
	Net deferred tax liability	$	(765.9	)	$	(802.9	)

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE J – FAIR VALUE MEASUREMENTS
	Fair value represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Inputs to valuation techniques used to measure fair value are either observable or unobservable. These inputs have been categorized into the fair value hierarchy described below:
	Level 1 – Valuations are based on quoted prices that the Company has the ability to obtain in actively traded markets for identical assets or liabilities. Since valuations are based on quoted prices that are readily and regularly available in an active market or exchange traded market, valuation of these instruments does not require a significant degree of judgment.
	Level 2 – Valuations are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
	Level 3 – Valuations are based on model-based techniques for which some or all of the assumptions are obtained from indirect market information that is significant to the overall fair value measurement and which require a significant degree of management judgment.
	There were no transfers of assets or liabilities between Level 1 and Level 2 of the fair value hierarchy during the year ended December 31, 2014. The Company’s policy is to recognize transfers between levels at the end of the reporting period.
	Assets and Liabilities Subject to Non-recurring and Recurring Fair Value Measurement
	Impaired loans and used trucks held for sale are measured on a non-recurring basis. Derivative contracts are measured on a recurring basis. The Company’s assets and liabilities subject to fair value measurements are as follows:
		December 31		December 31
	Level 2	2014		2013
	Assets:
	Impaired loans, net of specific reserves (2014 - nil and 2013 - $.1)	$	11.3	$	7
	Used trucks held for sale		3		8.7
	Derivative contracts		0.9		1.6
	Liabilities:
	Derivative contracts	$	3.6	$	6
	The Company uses the following methods and assumptions to measure fair value for assets and liabilities subject to non-recurring and recurring fair value measurements:
	Impaired Loans: Impaired loans are generally considered collateral dependent. Accordingly, the evaluation of individual reserves considers the fair value of the associated collateral (estimated sales proceeds less the costs to sell).
	Used Trucks Held for Sale: The carrying amount of used trucks held for sale is written down as necessary to reflect the fair value less costs to sell. The Company determines the fair value of used trucks from a pricing matrix, which is based on the market approach. The significant observable inputs into the valuation model are recent sales prices of comparable units and the condition of the vehicles. Used truck impairments related to units held at December 31, 2014 and 2013 were $1.0 and $1.6 during 2014 and 2013, respectively. These assets, which are shown in the above table when they are written down to fair value less costs to sell, are categorized as Level 2 and are included in Other assets on the Balance Sheets.
	Derivative Financial Instruments: The Company’s derivative financial instruments consist of interest-rate swaps and are carried at fair value. These derivative contracts are traded over the counter and their fair value is determined using industry standard valuation models, which are based on the income approach (i.e., discounted cash flows). The significant observable inputs into the valuation models include interest rates, yield curves and credit default swap spreads. These contracts are categorized as Level 2 and are included in Other assets and Accounts payable, accrued expenses and other on the Balance Sheets.
	Fair Value Disclosure of Other Financial Instruments
	For financial instruments that are not recognized at fair value, the Company uses the following methods and assumptions to determine the fair value. These instruments are categorized as Level 2, except cash which is categorized as Level 1 and fixed rate loans which are categorized as Level 3.
	Cash: Carrying amounts approximate fair value.
	Net Receivables: For floating rate loans, wholesale financings and operating lease and other trade receivables, carrying values approximate fair values. For fixed rate loans, fair values are estimated using the income approach by discounting cash flows to their present value based on current rates for comparable loans. Finance lease receivables and related allowance for credit losses have been excluded from the accompanying table.
	Commercial Paper and Medium-Term Notes: The carrying amounts of the Company’s commercial paper and variable medium-term notes approximate fair value. For fixed rate debt, fair values are estimated using the income approach by discounting cash flows to their present value based on current rates for comparable debt.
	The Company’s estimate of fair value for fixed rate loans and debt that are not carried at fair value was as follows:
		December 31				December 31
		2014				2013
		Carrying		Fair		Carrying		Fair
		Amount		Value		Amount		Value
	Assets:
	Due from PACCAR	$	725.5	$	730.3	$	550.5	$	554.5
	Due from foreign finance affiliates		171		172		216		218.4
	Fixed rate loans		2,619.60		2,655.70		2,393.10		2,413.90
	Liabilities:
	Due to PACCAR					$	218	$	219.7
	Fixed rate debt	$	3,249.50	$	3,265.70		2,749.90		2,774.40

Quarterly_Results

Quarterly Results	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results	NOTE K – QUARTERLY RESULTS (UNAUDITED)
		QUARTER
		First		Second		Third		Fourth
	2014
	Interest and other revenues	$	134.8	$	139.7	$	143.4	$	145.6
	Income before income taxes		39.9		42		45.9		47.2
	Net income		24.7		26		26.1		31.8
	2013
	Interest and other revenues	$	140.9	$	132.6	$	135.7	$	135.8
	Income before income taxes		36.6		36.1		40.9		45.8
	Net income		22.7		22.4		25.4		28.7

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE L – COMMITMENTS AND CONTINGENCIES
	The Company is a party to various routine legal proceedings incidental to its business involving the collection of accounts and other matters. The Company believes that any reasonably possible range of losses with respect to these matters in addition to amounts accrued is not material to the Company’s financial statements.
	At December 31, 2014, the Company has loan and lease commitments of $253.3 expiring within one year. These commitments represent commitments to fund new retail loan and lease contracts.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Description of Operations and Basis of Presentation	Description of Operations and Basis of Presentation:
	PACCAR Financial Corp. (the “Company”), is a wholly-owned subsidiary of PACCAR Inc (“PACCAR”). The Company primarily provides financing of PACCAR manufactured trucks and related equipment sold by authorized dealers. The Company also finances dealer inventories of transportation equipment and franchises Kenworth and Peterbilt dealerships to engage in full-service and finance leasing. The operations of the Company are fundamentally affected by its relationship with PACCAR.
	Due to the nature of the Company’s business, customers are concentrated in the transportation industry throughout the United States. Generally, all receivables are collateralized by the equipment being financed. The risk of credit losses related to this concentration has been considered in establishing the allowance for losses.
Use of Estimates	Use of Estimates:
	The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Finance and Other Receivables	Finance and Other Receivables:
	Loans – Loans represent fixed or floating rate loans to customers or dealers collateralized by the vehicles purchased and are recorded at amortized cost.
	Finance leases – Finance leases are retail direct financing leases and sales-type finance leases, which lease equipment to retail customers and dealers. These leases are reported as the sum of minimum lease payments receivable and estimated residual value of the property subject to the contracts, reduced by unearned interest.
	Dealer wholesale financing – Dealer wholesale financing is floating rate wholesale loans to Kenworth and Peterbilt dealers for new and used trucks and are recorded at amortized cost. The loans are collateralized by the trucks being financed.
	Operating lease and other trade receivables – Operating lease and other trade receivables are monthly rentals due on operating leases, interest on loans and other amounts due within one year in the normal course of business.
Allowance for Credit Losses	Allowance for Credit Losses:
	The Company continuously monitors the payment performance of its finance receivables. For large retail finance customers and dealers with wholesale financing, the Company regularly reviews their financial statements and makes site visits and phone contact as appropriate. If the Company becomes aware of circumstances that could cause those customers or dealers to face financial difficulty, whether or not they are past due, the customers are placed on a watch list.
	The Company modifies loans and finance leases as a normal part of its operations. The Company may modify loans and finance leases for commercial reasons or for credit reasons. Modifications for commercial reasons are changes to contract terms for customers that are not considered to be in financial difficulty. Insignificant delays are modifications extending terms up to three months for customers experiencing some short term financial stress but not considered to be in financial difficulty. Modifications for credit reasons are changes to contract terms for customers considered to be in financial difficulty. The Company’s modifications typically result in granting more time to pay the contractual amounts owed and charging a fee and interest for the term of the modification.
	On average, modifications extended contractual terms by four months in 2014 and 2013 and did not have a significant effect on the weighted average term or interest rate of the total portfolio at December 31, 2014 or 2013.
	When considering whether to modify customer accounts for credit reasons, the Company evaluates the creditworthiness of the customers and modifies those accounts that the Company considers likely to perform under the modified terms. When the Company modifies loans and finance leases for credit reasons and grants a concession, the modifications are classified as troubled debt restructurings (TDR). The Company does not typically grant credit modifications for customers that do not meet minimum underwriting standards since the Company normally repossesses the financed equipment in these circumstances. When such modifications do occur, they are considered TDRs.
	The Company has developed a systematic methodology for determining the allowance for credit losses for its two portfolio segments, retail and wholesale. The retail segment consists of retail loans and direct finance leases, net of unearned interest. The wholesale segment consists of truck inventory financing loans to dealers that are collateralized by trucks and other collateral. The wholesale segment generally has less risk than the retail segment. Wholesale receivables generally are shorter in duration than retail receivables, and the Company requires monthly reporting of the wholesale dealer’s financial condition, conducts periodic audits of the trucks being financed and, in many cases, obtains personal guarantees or other security such as dealership assets. In determining the allowance for credit losses, retail loans and finance leases are evaluated together since they relate to a similar customer base, their contractual terms require regular payment of principal and interest, generally over 36 to 60 months, and they are secured by the same type of collateral. The allowance for credit losses consists of both specific and general reserves.
	The Company individually evaluates certain finance receivables for impairment. Finance receivables that are evaluated individually for impairment consist of all wholesale accounts and certain large retail accounts with past due balances or otherwise determined to be at a higher risk of loss. A finance receivable is impaired if it is considered probable the Company will be unable to collect all contractual interest and principal payments as scheduled. In addition, all retail loans and leases which have been classified as TDRs and all customer accounts over 90-days past due are considered impaired. Generally, impaired accounts are on non-accrual status. Impaired accounts classified as TDRs which have been performing for 90 consecutive days are placed on accrual status if it is deemed probable that the Company will collect all principal and interest payments.
	Impaired receivables are generally considered collateral dependent. Large balance retail and all wholesale impaired receivables are individually evaluated to determine the appropriate reserve for losses. The determination of reserves for large balance impaired receivables considers the fair value of the associated collateral. When the underlying collateral fair value exceeds the Company’s recorded investment, no reserve is recorded. Small balance impaired receivables with similar risk characteristics are evaluated as a separate pool to determine the appropriate reserve for losses using the historical loss information discussed below.
	For finance receivables that are not individually impaired, the Company collectively evaluates and determines the general allowance for credit losses for both retail and wholesale receivables based on historical loss information, using past-due account data and current market conditions. Information used includes assumptions regarding the likelihood of collecting current and past-due accounts, repossession rates, the recovery rate on the underlying collateral based on used truck values and other pledged collateral or recourse.
	The Company has developed a range of loss estimates for its portfolio based on historical experience, taking into account loss frequency and severity in both strong and weak truck market conditions. A projection is made of the range of estimated credit losses inherent in the portfolio from which an amount is determined as probable based on current market conditions and other factors impacting the creditworthiness of the Company’s borrowers and their ability to repay. After determining the appropriate level of the allowance for credit losses, a provision for losses on finance receivables is charged to income as necessary to reflect management’s estimate of incurred credit losses, net of recoveries, inherent in the portfolio.
	In determining the fair value of the collateral, the Company uses a pricing matrix and categorizes the fair value as Level 2 in the hierarchy of fair value measurement. The pricing matrix is reviewed quarterly and updated as appropriate. The pricing matrix considers the make, model and year of the equipment as well as recent sales prices of comparable equipment through wholesale channels to the Company’s dealers (principal market). The fair value of the collateral also considers the overall condition of the equipment.
	Accounts are charged off against the allowance for credit losses when, in the judgment of management, they are considered uncollectible (generally upon repossession of the collateral). Typically the timing between the repossession and charge-off is not significant. In cases where repossession is delayed (e.g., for legal proceedings), the Company records partial charge-offs. The charge-off is determined by comparing the fair value of the collateral, less cost to sell, to the recorded investment.
Revenue Recognition	Revenue Recognition:
	Interest income from finance and other receivables is recognized using the interest method. Certain loan origination costs are deferred and amortized to interest income over the expected life of the contracts, generally 36 to 60 months, using the straight-line method which approximates the interest method. For operating leases, rental revenue is recognized on a straight-line basis over the lease term.
	Recognition of interest income and rental revenue is suspended (put on non-accrual status) when the receivable becomes more than 90 days past the contractual due date or earlier if some other event causes the Company to determine that collection is not probable. Accordingly, no finance receivables more than 90 days past due were accruing interest at December 31, 2014 or December 31, 2013. Recognition is resumed if the receivable becomes current by the payment of all amounts due under the terms of the existing contract and collection of remaining amounts is considered probable (if not contractually modified) or if the customer makes scheduled payments for three months and collection of remaining amounts is considered probable (if contractually modified). Payments received while the finance receivable is on non-accrual status are applied to interest and principal in accordance with the contractual terms.
	The Company recognizes revenue on the sale of used trucks acquired from PACCAR truck division customers as part of new truck sales packages when the used trucks are invoiced and delivered to a customer.
Equipment on Operating Leases	Equipment on Operating Leases:
	Equipment on operating leases is recorded at cost and is depreciated on the straight-line basis to its estimated residual value. Residual values are reviewed regularly and adjusted if market conditions warrant.
Restricted Cash	Restricted Cash:
	Restricted cash consists of cash proceeds from the sale of eligible assets set aside for the acquisition of replacement assets under the Company’s like-kind exchange tax program. The changes in restricted cash balances are reflected as an investing activity in the Statements of Cash Flows as they relate to sales and purchases of revenue earning assets.
Derivative Financial Instruments	Derivative Financial Instruments:
	Derivative financial instruments are used to hedge exposures to fluctuations in interest rates. Certain derivative instruments designated as either cash flow hedges or fair value hedges are subject to hedge accounting. Derivative instruments that are not subject to hedge accounting are held as economic hedges. The Company’s policies prohibit the use of derivatives for speculation or trading. At the inception of each hedge relationship, the Company documents its risk management objectives, procedures and accounting treatment.
	All of the Company’s interest-rate contracts are transacted under International Swaps and Derivatives Association (ISDA) master agreements. Each agreement permits the net settlement of amounts owed in the event of default and certain other termination events. The Company has elected not to offset derivative positions in the balance sheet with the same counterparty under the same master netting agreements. The Company is not required to post or receive collateral under these agreements. Exposure limits and minimum credit ratings are used to minimize the risks of counterparty default. The Company had no material exposures to default at December 31, 2014.
	The Company uses regression analysis to assess effectiveness of interest-rate contracts on a quarterly basis. All components of the derivative instrument’s gain or loss are included in the assessment of hedge effectiveness. Gains or losses on the ineffective portion of cash flow hedges are recognized currently in earnings. Hedge accounting is discontinued prospectively when the Company determines that a derivative financial instrument has ceased to be a highly effective hedge.
Income Taxes	Income Taxes:
	The Company is included in the consolidated federal income tax return of PACCAR. Federal income taxes for the Company are determined on a separate return basis, and any related tax liability is paid by the Company to PACCAR and any related tax benefit is paid by PACCAR to the Company. State income taxes, where the Company files combined tax returns with PACCAR, are determined on a blended statutory rate, which is substantially the same as the rate computed on a separate return basis. As of December 31, 2014, the United States Internal Revenue Service has completed examinations of PACCAR’s tax returns for all years through 2010. PACCAR’s tax returns remain subject to examination in most jurisdictions for the years ranging from 2010 through 2014.
Preferred Stock	Preferred Stock:
	The Company’s Articles of Incorporation provide that the 6%, noncumulative, nonvoting preferred stock (100% owned by PACCAR) is redeemable only at the option of the Company’s Board of Directors.
New Accounting Pronouncements	New Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers. This ASU amends the existing accounting standards for revenue recognition. Under the new revenue recognition model, a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The ASU is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The amendment may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the transition alternatives and impact on the Company’s financial statements.
	In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward if available under the applicable tax jurisdiction. The ASU was effective for annual periods beginning after December 15, 2013 and interim periods within those annual periods. The Company adopted ASU 2013-11 in the first quarter of 2014; the implementation of this amendment did not have an impact on the Company’s financial statements.

Finance_and_Other_Receivables_

Finance and Other Receivables (Tables)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Finance and Other Receivables	The Company’s finance and other receivables are as follows:
			December 31			December 31
			2014			2013
	Retail loans		$	2,687.70		$	2,442.50
	Retail direct financing leases			1,699.80			1,577.00
	Dealer wholesale financing			743.4			578
	Dealer master notes			62.7			105.1
	Operating lease and other receivables			31.4			36.7
	Unearned interest on finance leases			(172.4	)		(155.9	)
				5,052.60			4,583.40
	Less allowance for losses:
	Loans and leases			(52.4	)		(51.5	)
	Dealer wholesale financing			(2.8	)		(3.0	)
	Operating lease and other trade receivables			(.8	)		(.8	)
			$	4,996.60		$	4,528.10
Annual Minimum Payments Due on Loans and Leases	Annual minimum payments due on loans and leases are as follows:
			Loans			Finance leases
	2015		$	779.3		$	396.4
	2016			690.4			392.8
	2017			585.6			333.7
	2018			398.8			240.8
	2019			249.8			171.6
	Thereafter			46.5			115.4
			$	2,750.40		$	1,650.70
Allowance for Credit Losses	The allowance for credit losses is summarized as follows:
			2014
			Dealer						Customer
			Wholesale			Retail			Retail			Other*			Total
	Balance at January 1		$	3.0		$	11.5		$	40		$	0.8		$	55.3
	Provision for losses			(.2	)		(1.1	)		6.4			0.2			5.3
	Charge-offs									(5.9	)		(.2	)		(6.1	)
	Recoveries									1.5						1.5
	Balance at December 31		$	2.8		$	10.4		$	42.0		$	.8		$	56.0
			2013
			Dealer						Customer
			Wholesale			Retail			Retail			Other*			Total
	Balance at January 1		$	3.9		$	10.7		$	37.1		$	1.1		$	52.8
	Provision for losses			(.9	)		0.8			2.6			(.2	)		2.3
	Charge-offs									(6.4	)		(.1	)		(6.5	)
	Recoveries									6.7						6.7
	Balance at December 31		$	3		$	11.5		$	40		$	0.8		$	55.3
			2012
			Dealer						Customer
			Wholesale			Retail			Retail			Other*			Total
	Balance at January 1		$	3.4		$	9.9		$	44.4		$	1.1		$	58.8
	Provision for losses			0.5			0.8			7.6			0.2			9.1
	Charge-offs									(16.7	)		(.2	)		(16.9	)
	Recoveries									1.8						1.8
	Balance at December 31		$	3.9		$	10.7		$	37.1		$	1.1		$	52.8
	*	Operating lease and other trade receivables
Finance Receivables Evaluated and Determined Individually and Collectively	Information regarding finance receivables evaluated and determined collectively and individually is as follows:
			Dealer						Customer
	At December 31, 2014		Wholesale			Retail			Retail			Total
	Recorded investment for impaired finance receivables evaluated individually								$	24.7		$	24.7
	Allowance for impaired finance receivables determined individually								$	(1.7	)	$	(1.7	)
	Recorded investment for finance receivables evaluated collectively		$	743.4		$	1,404.70		$	2,848.40		$	4,996.50
	Allowance for finance receivables determined collectively		$	(2.8	)	$	(10.4	)	$	(40.3	)	$	(53.5	)
			Dealer						Customer
	At December 31, 2013		Wholesale			Retail			Retail			Total
	Recorded investment for impaired finance receivables evaluated individually								$	19.1		$	19.1
	Allowance for impaired finance receivables determined individually								$	(2.0	)	$	(2.0	)
	Recorded investment for finance receivables evaluated collectively		$	578		$	1,318.8		$	2,630.80		$	4,527.60
	Allowance for finance receivables determined collectively		$	(3.0	)	$	(11.5	)	$	(38.0	)	$	(52.5	)
Recorded Investment for Finance Receivables that are on Non-accrual Status	The recorded investment for finance receivables that are on non-accrual status is as follows:
			December 31			December 31
			2014			2013
	Customer Retail:
	Fleet		$	23		$	17
	Owner/Operator			1.7			2.1
			$	24.7		$	19.1
Impaired Loans and Specific Reserve	Impaired loans with no specific reserve were $12.2 and $7.3 at December 31, 2014 and 2013, respectively. Impaired loans with a specific reserve are summarized below. The impaired loans with specific reserve represent the unpaid principal balance. The recorded investment of impaired loans as of December 31, 2014 and 2013 was not significantly different than the unpaid principal balance.
			Dealer			Customer Retail
									Owner/
	At December 31, 2014		Wholesale		Retail	Fleet			Operator			Total
	Impaired loans with specific reserve					$	8.3		$	1.6		$	9.9
	Associated allowance						(.9	)		(.4	)		(1.3	)
	Net carrying amount of impaired loans					$	7.4		$	1.2		$	8.6
	Average recorded investment					$	16.5		$	1.6		$	18.1
			Dealer			Customer Retail
									Owner/
	At December 31, 2013		Wholesale		Retail	Fleet			Operator			Total
	Impaired loans with specific reserve					$	6.5		$	1.9		$	8.4
	Associated allowance						(1.0	)		(.5	)		(1.5	)
	Net carrying amount of impaired loans					$	5.5		$	1.4		$	6.9
	Average recorded investment					$	13.6		$	3.1		$	16.7
Interest Income Recognized on Cash Basis	During the period the loans above were considered impaired, interest income recognized on a cash basis was as follows:
			2014			2013			2012
	Customer Retail:
	Fleet		$	0.9		$	1.4		$	0.5
	Owner/Operator			0.4			0.5			0.5
			$	1.3		$	1.9		$	1.0
Finance Receivables by Credit Quality Indicator	The tables below summarize the Company’s finance receivables by credit quality indicator and portfolio class.
			Dealer						Customer Retail
												Owner/
	At December 31, 2014		Wholesale			Retail			Fleet			Operator			Total
	Performing		$	734.3		$	1,404.7		$	2,376.6		$	471.3		$	4,986.9
	Watch			9.1						0.1			0.4			9.6
	At-risk									23			1.7			24.7
	Total		$	743.4		$	1,404.70		$	2,399.70		$	473.4		$	5,021.20
			Dealer						Customer Retail
												Owner/
	At December 31, 2013		Wholesale			Retail			Fleet			Operator			Total
	Performing		$	576.9		$	1,313.90		$	2,264.50		$	365.1		$	4,520.40
	Watch			1.1			5			0.9			0.2			7.2
	At-risk									17			2.1			19.1
	Total		$	578		$	1,318.90		$	2,282.40		$	367.4		$	4,546.70
Financing Receivables by Aging Category	The tables below summarize the Company’s finance receivables by aging category. In determining past due status, the Company considers the entire contractual account balance past due when any installment is over 30 days past due. Substantially all customer accounts that were greater than 30 days past due prior to credit modification became current upon modification for aging purposes.
			Dealer						Customer Retail
												Owner/
	At December 31, 2014		Wholesale			Retail			Fleet			Operator			Total
	Current and up to 30 days past-due		$	743.4		$	1,404.70		$	2,398.10		$	472.5		$	5,018.70
	31 – 60 days past-due									1						1
	Greater than 60 days past-due									0.6			0.9			1.5
	Total		$	743.4		$	1,404.70		$	2,399.70		$	473.4		$	5,021.20
			Dealer						Customer Retail
												Owner/
	At December 31, 2013		Wholesale			Retail			Fleet			Operator			Total
	Current and up to 30 days past-due		$	578		$	1,318.90		$	2,270.70		$	365.7		$	4,533.30
	31 – 60 days past-due									1.4			0.5			1.9
	Greater than 60 days past-due									10.3			1.2			11.5
	Total		$	578		$	1,318.90		$	2,282.40		$	367.4		$	4,546.70
Pre-Modification and Post-Modification Recorded Investment Balances by Portfolio Class	At modification date, the pre- and post-modification recorded investment balances for finance receivables modified during the period by portfolio class are as follows:
			2014						2013
			Recorded Investment						Recorded Investment
			Pre-Modification			Post-Modification			Pre-Modification			Post-Modification
	Fleet		$	22		$	22		$	2.3		$	2.3
	Owner/Operator			0.3			0.3			0.3			0.3
			$	22.3		$	22.3		$	2.6		$	2.6
TDRs Modified During Previous Twelve Months that Subsequently Defaulted by Portfolio Class	TDRs during the previous twelve months that subsequently defaulted (i.e. became more than 30 days past-due) during the period by portfolio class are as follows:
			Year ended December 31
			2014			2013
	Fleet					$	0.2
	Owner/Operator		$	0.1
			$	0.1		$	0.2

Transactions_with_PACCAR_and_A1

Transactions with PACCAR and Affiliates (Tables)	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Amounts Outstanding Including Foreign Finance Affiliates	Amounts outstanding at December 31, 2014 and 2013, including foreign finance affiliates operating in the United Kingdom, the Netherlands, Mexico, Canada and Australia, are summarized below:
		December 31		December 31
		2014		2013
	Due from PACCAR and affiliates
	Loans due from PACCAR	$	830.5	$	653.6
	Loans due from foreign finance affiliates		361		429.6
	Direct financing leases due from affiliate		15.1		14.7
	Tax-related receivable due from PACCAR				193.7
	Receivables		82.3		75.7
	Total	$	1,288.90	$	1,367.30
	Due to PACCAR and affiliates
	Loans due to PACCAR			$	218
	Tax-related payable due to PACCAR	$	11.8
	Payables		45.4		41.4
	Total	$	57.2	$	259.4

Stockholders_Equity_Tables

Stockholder's Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Changes in and Reclassifications out of Accumulated Other Comprehensive Loss	Changes in and reclassifications out of AOCL during 2014 and 2013 are as follows:
		2014			2013
	Balance at beginning of year	$	(2.7	)	$	(7.7	)
	Amounts recorded in AOCL
	Unrealized loss on derivative contracts		(7.4	)
	Income tax effect		2.7
	Amounts reclassified out of AOCL
	Interest and other borrowing costs		9.9			8
	Income taxes		(3.7	)		(3.0	)
	Net other comprehensive income		1.5			5
	Balance at end of year	$	(1.2	)	$	(2.7	)

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Balance Sheet Classification, Fair Value and Gross and Net Amounts of Derivative Financial Instruments	The following table presents the balance sheet classification, fair value and gross and net amounts of derivative financial instruments:
	At December 31, 2014
	Interest-rate contracts	Gross Amount			Amount Not Offset			Pro Forma Net
		Recognized  in			in Financial			Amount
		Balance Sheets			Instruments
	Assets:
	Other assets	$	0.9		$	(.4	)	$	0.5
	Liabilities
	Accounts payable, accrued expenses and other	$	3.6		$	(.4	)	$	3.2
	At December 31, 2013
	Interest-rate contracts	Gross Amount			Amount Not Offset			Pro Forma Net
		Recognized in			in Financial			Amount
		Balance Sheets			Instruments
	Assets:
	Other assets	$	1.6		$	(.2	)	$	1.4
	Liabilities
	Accounts payable, accrued expenses and other	$	6		$	(.2	)	$	5.8
Fair Value Hedging
Gains/Losses of Derivative Financial Instruments	Changes in the fair value of derivatives designated as fair value hedges are recorded in earnings together with the changes in fair value of the hedged item attributable to the risk being hedged. The expense or (income) recognized in earnings related to fair value hedges was included in Interest and other borrowing costs in the Statements of Income as follows:
		Year ended December 31
		2014		2013	2012
	Interest-rate swaps				$	(2.3	)
	Term notes				$	2.1
Cash Flow Hedging
Gains/Losses of Derivative Financial Instruments	The following table presents the pre-tax effects of derivative instruments designated as cash flow hedges recognized in other comprehensive income (OCI) and expenses reclassified from AOCL into income.
		Year ended December 31
		2014			2013			2012
	Pre-tax loss on derivative contracts recognized in OCI	$	(7.4	)				$	(9.5	)
	Expenses reclassified from AOCL into
	Interest and other borrowing expenses	$	9.9		$	8		$	9.9

Borrowings_Tables

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Summary of Borrowings	Borrowings are summarized as follows:
		2014				2013
		Effective		Borrowings		Effective		Borrowings
		Rate				Rate
	Commercial paper		0.40%	$	1,500.60		0.60%	$	1,149.80
	Fixed rate medium-term notes		1.18%		3,249.50		1.10%		2,749.90
	Floating rate medium-term notes		1.10%		900		0.81%		1,100.00
			0.96%	$	5,650.10		0.93%	$	4,999.70
Summary Of Annual Maturities	The annual principal maturities of the borrowings are as follows:
		Commercial		Term		Total
		Paper		Notes
	2015	$	1,500.60	$	1,050.00	$	2,550.60
	2016				1,250.00		1,250.00
	2017				1,300.00		1,300.00
	2018				250		250
	2019				300		300
		$	1,500.60	$	4,150.00	$	5,650.60

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Components Of Provision for Income Taxes	The provision for income taxes consisted of the following:
		Year ended December 31
		2014			2013			2012
	Current provision (benefit)
	Federal	$	102.8		$	(9.7	)	$	(1.4	)
	State		1.5			(1.9	)		5.2
			104.3			(11.6	)		3.8
	Deferred (benefit) provision
	Federal		(44.3	)		60.9			42.9
	State		6.4			10.9			3.2
			(37.9	)		71.8			46.1
	Total provision for income taxes	$	66.4		$	60.2		$	49.9
Reconciliation Of Statutory and Effective Income Tax Rates	A reconciliation between the statutory federal income tax rate to the actual provision for income taxes is shown below:
		Year ended December 31
		2014			2013			2012
	Statutory rate		35.00%			35.00%			35.00%
	Effect of:
	State		3.00%			3.50%			1.90%
	Other		-0.10%			-0.70%			0.50%
			37.90%			37.80%			37.40%
Deferred Tax Assets and Liabilities	The tax effects of temporary differences representing deferred tax assets and liabilities are as follows:
		December 31			December 31
		2014			2013
	Deferred tax assets:
	Allowance for losses on receivables	$	21.3		$	21.1
	Derivative liability		1			2.2
	Other		8.1			9.6
	Deferred tax liabilities:
	Asset capitalization and depreciation		(796.3	)		(835.8	)
	Net deferred tax liability	$	(765.9	)	$	(802.9	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Assets and Liabilities Fair Value Measurements	The Company’s assets and liabilities subject to fair value measurements are as follows:
		December 31		December 31
	Level 2	2014		2013
	Assets:
	Impaired loans, net of specific reserves (2014 - nil and 2013 - $.1)	$	11.3	$	7
	Used trucks held for sale		3		8.7
	Derivative contracts		0.9		1.6
	Liabilities:
	Derivative contracts	$	3.6	$	6
Carrying Amount and Fair Value Fixed-Rate Loans and Fixed-Rate Debt	The Company’s estimate of fair value for fixed rate loans and debt that are not carried at fair value was as follows:
		December 31				December 31
		2014				2013
		Carrying		Fair		Carrying		Fair
		Amount		Value		Amount		Value
	Assets:
	Due from PACCAR	$	725.5	$	730.3	$	550.5	$	554.5
	Due from foreign finance affiliates		171		172		216		218.4
	Fixed rate loans		2,619.60		2,655.70		2,393.10		2,413.90
	Liabilities:
	Due to PACCAR					$	218	$	219.7
	Fixed rate debt	$	3,249.50	$	3,265.70		2,749.90		2,774.40

Quarterly_Results_Tables

Quarterly Results (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information
		QUARTER
		First		Second		Third		Fourth
	2014
	Interest and other revenues	$	134.8	$	139.7	$	143.4	$	145.6
	Income before income taxes		39.9		42		45.9		47.2
	Net income		24.7		26		26.1		31.8
	2013
	Interest and other revenues	$	140.9	$	132.6	$	135.7	$	135.8
	Income before income taxes		36.6		36.1		40.9		45.8
	Net income		22.7		22.4		25.4		28.7

Significant_Accounting_Policie2

Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	Segment
Accounting Policies [Abstract]
Extension of contractual terms	4 months	4 months
Number of portfolio segments	2
Preferred stock dividend percentage	6.00%
Ownership percentage of PACCAR	100.00%
Internal Revenue Service (IRS)
Accounting Policies [Abstract]
Income tax examination, description	The United States Internal Revenue Service has completed examinations of PACCAR's tax returns for all years through 2010. PACCAR's tax returns remain subject to examination in most jurisdictions for the years ranging from 2010 through 2014.
Earliest Tax Year | Internal Revenue Service (IRS)
Accounting Policies [Abstract]
Tax years subject to examination	2010
Latest Tax Year | Internal Revenue Service (IRS)
Accounting Policies [Abstract]
Tax years subject to examination	2014
Minimum | Loans Receivable
Accounting Policies [Abstract]
Contractual term of regular payment of principal and interest	36 months
Minimum | Finance Leases Financing Receivable
Accounting Policies [Abstract]
Origination costs, amortization period	36 months
Maximum | Loans Receivable
Accounting Policies [Abstract]
Contractual term of regular payment of principal and interest	60 months
Maximum | Finance Leases Financing Receivable
Accounting Policies [Abstract]
Origination costs, amortization period	60 months

Finance_and_Other_Receivables_1

Finance and Other Receivables (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail loans	$2,687.70	$2,442.50
Retail direct financing leases	1,699.80	1,577
Dealer wholesale financing	743.4	578
Dealer master notes	62.7	105.1
Operating lease and other receivables	31.4	36.7
Unearned interest on finance leases	-172.4	-155.9
Total portfolio	5,052.60	4,583.40
Allowance for losses	-56	-55.3	-52.8	-58.8
Total portfolio, net of allowance for losses	4,996.60	4,528.10
Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for losses	-52.4	-51.5
Dealer | Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for losses	-2.8	-3	-3.9	-3.4
Operating lease and other trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for losses	($0.80)	($0.80)

Annual_Minimum_Payment_Due_on_

Annual Minimum Payment Due on Loans and Leases (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment of finance receivables that are on non-accrual status	$24.70	$19.10
Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
2015	779.3
2016	690.4
2017	585.6
2018	398.8
2019	249.8
Thereafter	46.5
Recorded investment of finance receivables that are on non-accrual status	2,750.40
Finance Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
2015	396.4
2016	392.8
2017	333.7
2018	240.8
2019	171.6
Thereafter	115.4
Recorded investment of finance receivables that are on non-accrual status	$1,650.70

Finance_and_Other_Receivables_2

Finance and Other Receivables - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans with no specific reserve	$12.20	$7.30
Troubled debt restructuring	20.6	6.1
Repossessed inventory	6.6	4.3
Proceeds from the sales of repossessed assets	18.6	19.5	11.3
Maximum | Financing Receivable | Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of customers diversification in portfolio	10.00%	10.00%
Swift Transportation Corporation | Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of customers diversification in portfolio	14.40%	11.40%	10.80%
Finance Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated residual values included with finance leases	$49.10	$51.40

Allowance_for_Credit_Losses_De

Allowance for Credit Losses (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$55.30		$52.80		$58.80
Provision for losses	5.3		2.3		9.1
Charge offs	-6.1		-6.5		-16.9
Recoveries	1.5		6.7		1.8
Ending Balance	56		55.3		52.8
Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3		3.9		3.4
Provision for losses	-0.2		-0.9		0.5
Ending Balance	2.8		3		3.9
Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	11.5		10.7		9.9
Provision for losses	-1.1		0.8		0.8
Ending Balance	10.4		11.5		10.7
Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	40		37.1		44.4
Provision for losses	6.4		2.6		7.6
Charge offs	-5.9		-6.4		-16.7
Recoveries	1.5		6.7		1.8
Ending Balance	42		40		37.1
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	0.8	[1]	1.1	[1]	1.1	[1]
Provision for losses	0.2	[1]	-0.2	[1]	0.2	[1]
Charge offs	-0.2	[1]	-0.1	[1]	-0.2	[1]
Ending Balance	$0.80	[1]	$0.80	[1]	$1.10	[1]
[1]	Operating lease and other trade receivables

Finance_Receivables_Summary_by

Finance Receivables Summary by those Evaluated Collectively and Individually (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment for finance receivables evaluated collectively	$743.40	$578
Allowance for finance receivables determined collectively	-2.8	-3
Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment for finance receivables evaluated collectively	1,404.70	1,318.80
Allowance for finance receivables determined collectively	-10.4	-11.5
Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment for impaired finance receivables evaluated individually	24.7	19.1
Allowance for impaired finance receivables determined individually	-1.7	-2
Recorded investment for finance receivables evaluated collectively	2,848.40	2,630.80
Allowance for finance receivables determined collectively	-40.3	-38
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment for impaired finance receivables evaluated individually	24.7	19.1
Allowance for impaired finance receivables determined individually	-1.7	-2
Recorded investment for finance receivables evaluated collectively	4,996.50	4,527.60
Allowance for finance receivables determined collectively	($53.50)	($52.50)

Recorded_Investment_for_Financ

Recorded Investment for Finance Receivables that are on Non-accrual Status (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Recorded investment of finance receivables that are on non-accrual status	$24.70	$19.10
Customer Retail | Fleet
Financing Receivable, Recorded Investment [Line Items]
Recorded investment of finance receivables that are on non-accrual status	23	17
Customer Retail | Owner/Operator
Financing Receivable, Recorded Investment [Line Items]
Recorded investment of finance receivables that are on non-accrual status	$1.70	$2.10

Impaired_Loans_and_Specific_Re

Impaired Loans and Specific Reserve (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Impaired loans with specific reserve	$9.90	$8.40
Associated allowance	-1.3	-1.5
Net carrying amount of impaired loans	8.6	6.9
Average recorded investment	18.1	16.7
Dealer | Wholesale
Financing Receivable, Impaired [Line Items]
Impaired loans with specific reserve
Associated allowance
Net carrying amount of impaired loans
Average recorded investment
Dealer | Retail
Financing Receivable, Impaired [Line Items]
Impaired loans with specific reserve
Associated allowance
Net carrying amount of impaired loans
Average recorded investment
Customer Retail | Fleet
Financing Receivable, Impaired [Line Items]
Impaired loans with specific reserve	8.3	6.5
Associated allowance	-0.9	-1
Net carrying amount of impaired loans	7.4	5.5
Average recorded investment	16.5	13.6
Other | Owner/Operator
Financing Receivable, Impaired [Line Items]
Impaired loans with specific reserve	1.6	1.9
Associated allowance	-0.4	-0.5
Net carrying amount of impaired loans	1.2	1.4
Average recorded investment	$1.60	$3.10

Interest_Income_Recognized_Det

Interest Income Recognized (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Interest income recognized on a cash basis	$1.30	$1.90	$1
Customer Retail | Fleet
Financing Receivable, Impaired [Line Items]
Interest income recognized on a cash basis	0.9	1.4	0.5
Customer Retail | Owner/Operator
Financing Receivable, Impaired [Line Items]
Interest income recognized on a cash basis	$0.40	$0.50	$0.50

Financing_Receivables_by_Credi

Financing Receivables by Credit Quality Indicator (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	$5,021.20	$4,546.70
Pass
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	4,986.90	4,520.40
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	9.6	7.2
Substandard
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	24.7	19.1
Dealer | Wholesale
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	743.4	578
Dealer | Retail
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	1,404.70	1,318.90
Dealer | Pass | Wholesale
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	734.3	576.9
Dealer | Pass | Retail
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	1,404.70	1,313.90
Dealer | Special Mention | Wholesale
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	9.1	1.1
Dealer | Special Mention | Retail
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables		5
Customer Retail | Fleet
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	2,399.70	2,282.40
Customer Retail | Pass | Fleet
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	2,376.60	2,264.50
Customer Retail | Special Mention | Fleet
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	0.1	0.9
Customer Retail | Substandard | Fleet
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	23	17
Other | Owner/Operator
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	473.4	367.4
Other | Pass | Owner/Operator
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	471.3	365.1
Other | Special Mention | Owner/Operator
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	0.4	0.2
Other | Substandard | Owner/Operator
Financing Receivable, Recorded Investment [Line Items]
Financing Receivables	$1.70	$2.10

Financing_Receivables_by_Aging

Financing Receivables by Aging Category (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and up to 30 days past-due	$5,018.70	$4,533.30
31 - 60 days past-due	1	1.9
Greater than 60 days past-due	1.5	11.5
Total	5,021.20	4,546.70
Dealer | Wholesale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and up to 30 days past-due	743.4	578
Total	743.4	578
Dealer | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and up to 30 days past-due	1,404.70	1,318.90
Total	1,404.70	1,318.90
Customer Retail | Fleet
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and up to 30 days past-due	2,398.10	2,270.70
31 - 60 days past-due	1	1.4
Greater than 60 days past-due	0.6	10.3
Total	2,399.70	2,282.40
Other | Owner/Operator
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and up to 30 days past-due	472.5	365.7
31 - 60 days past-due		0.5
Greater than 60 days past-due	0.9	1.2
Total	$473.40	$367.40

Pre_and_Post_Modification_Reco

Pre and Post Modification Recorded Investment (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Investment	$22.30	$2.60
Post-Modification Recorded Investment	22.3	2.6
Customer Retail | Fleet
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Investment	22	2.3
Post-Modification Recorded Investment	22	2.3
Customer Retail | Owner/Operator
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Investment	0.3	0.3
Post-Modification Recorded Investment	$0.30	$0.30

PostModification_Recorded_Inve

Post-Modification Recorded Investment of Finance Receivables Modified as TDR Modified During Previous Twelve Months that Subsequently Defaulted by Portfolio Class (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Recorded investment, subsequently defaulted	$0.10	$0.20
Customer Retail | Fleet
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Recorded investment, subsequently defaulted		0.2
Customer Retail | Owner/Operator
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Recorded investment, subsequently defaulted	$0.10

Equipment_on_Operating_Leases_

Equipment on Operating Leases - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Minimum
Operating Leased Assets [Line Items]
Operating lease term	3 years
Maximum
Operating Leased Assets [Line Items]
Operating lease term	7 years
Non Cancelable Operating Leases
Operating Leased Assets [Line Items]
Future annual minimum rental payments	$636
2015	253.1
2016	187.5
2017	121.6
2018	54.9
2019	18.9
Depreciation expense	$231	$208.80	$179.50

Transactions_with_PACCAR_and_A2

Transactions with PACCAR and Affiliates - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Facility
Related Party Transaction [Line Items]
Required ratio of net earnings available for fixed charges to fixed charges	125.00%
Loans due to PACCAR	$57.20	$259.40
Fixed interest rate	6.88%
Loan maturity period	2014-02
Interest expense on borrowings from PACCAR	1.8	15	16.9
Interest paid on borrowings from PACCAR	7.5	15	20.7
Letter of credit issued	3.3
Administrative services fees	4.7	2.9	3
Number of facilities leased by company	5
Defined benefit pension plan expenses	2.4	2.9	2.7
Defined contribution plan expenses	1.1	1.1	1.2
PACCAR
Related Party Transaction [Line Items]
Loans due to PACCAR		218
Foreign Finance Affiliates
Related Party Transaction [Line Items]
Loans to foreign affiliates, upper limit	$500

Amounts_Outstanding_Including_

Amounts Outstanding Including Foreign Finance Affiliates (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Due from PACCAR and affiliates
Direct financing leases due from affiliate	$15.10	$14.70
Loans due from affiliates	1,288.90	1,367.30
Due to PACCAR and affiliates
Loans due to affiliates	57.2	259.4
Foreign Finance Affiliates
Due from PACCAR and affiliates
Loans due from affiliates	361	429.6
PACCAR
Due from PACCAR and affiliates
Loans due from affiliates	830.5	653.6
Due to PACCAR and affiliates
Loans due to affiliates		218
Tax-related receivable
Due from PACCAR and affiliates
Loans due from affiliates		193.7
Receivables
Due from PACCAR and affiliates
Loans due from affiliates	82.3	75.7
Payables
Due to PACCAR and affiliates
Loans due to affiliates	45.4	41.4
Tax-related payable
Due to PACCAR and affiliates
Loans due to affiliates	$11.80

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Equity [Abstract]
Accumulated other comprehensive income (loss)	($1.20)	($2.70)

Changes_in_and_Reclassificatio

Changes in and Reclassifications out of Accumulated Other Comprehensive Income (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	($2.70)
Amounts recorded in AOCL
Unrealized loss on derivative contracts	-7.4		-9.5
Income tax effect	2.7		3.5
Amounts reclassified out of AOCL
Interest and other borrowing costs	9.9	8	9.9
Income taxes	-3.7	-3	-3.7
Net other comprehensive income	1.5	5	0.2
Ending balance	-1.2	-2.7
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	-2.7	-7.7
Amounts recorded in AOCL
Unrealized loss on derivative contracts	-7.4
Income tax effect	2.7
Amounts reclassified out of AOCL
Interest and other borrowing costs	9.9	8
Income taxes	-3.7	-3
Net other comprehensive income	1.5	5
Ending balance	($1.20)	($2.70)

Derivative_Financial_Instrumen2

Derivative Financial Instruments - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional amount of interest-rate contracts	$1,147
Interest-rate contracts maturity period	6 years
Notional maturities for interest-rate contracts 2015	325
Notional maturities for interest-rate contracts 2016	392
Notional maturities for interest-rate contracts 2017	100
Notional maturities for interest-rate contracts 2018	250
Notional maturities for interest-rate contracts 2019	40
Notional maturities for interest-rate contracts 2020	40
Maximum length of time for which company is hedging its exposure to the variability in future cash flows	5 years 9 months 18 days
Accumulated net loss on interest rate contracts included in AOCL	1.2
Accumulated net loss on interest rate contracts included in AOCL expected to be reclassified to interest expense in the following 12 months	3.5
Net interest income from settlement of interest-rate swaps			$0.90

Balance_Sheet_Classification_F

Balance Sheet Classification, Fair Value and Gross and Net Amounts of Derivative Financial Instruments (Detail) (Interest Rate Contract, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Other Assets
Derivatives, Fair Value [Line Items]
Gross Amount Recognized in Balance Sheets	$0.90	$1.60
Gross Amounts Not Offset in Financial Instruments	-0.4	-0.2
Pro Forma Net Amount	0.5	1.4
Accounts Payable, Accrued Expenses and Other
Derivatives, Fair Value [Line Items]
Gross Amount Recognized in Balance Sheets	3.6	6
Gross Amounts Not Offset in Financial Instruments	-0.4	-0.2
Pro Forma Net Amount	$3.20	$5.80

PreTax_Effects_of_Derivative_I

Pre-Tax Effects of Derivative Instruments Recognized into Accumulated Other Comprehensive Income (OCI) and into Statements of Income (Detail) (Cash Flow Hedging, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Pre-tax loss on derivative contracts recognized in OCI	($7.40)		($9.50)
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Expenses reclassified from AOCL into Interest and other borrowing expenses	$9.90	$8	$9.90

Income_or_Expense_Recognized_i

(Income) or Expense Recognized in Earnings Related to Fair Value Hedges (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Rate Swap
Derivative [Line Items]
(Income) or expense recognized in earnings related to fair value hedges			($2.30)
Term Loan
Derivative [Line Items]
(Income) or expense recognized in earnings related to fair value hedges			$2.10

Summary_of_Borrowings_Detail

Summary of Borrowings (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Instrument [Line Items]
Effective borrowing rate	0.96%	0.93%
Commercial paper	$1,500.60	$1,149.80
Medium-term notes	4,149.50	3,849.90
Commercial Paper, Bank Loans, and Term Debt at Carrying Value, Total	5,650.10	4,999.70
Commercial Paper
Debt Instrument [Line Items]
Effective borrowing rate	0.40%	0.60%
Fixed Rate Medium-Term Notes
Debt Instrument [Line Items]
Effective borrowing rate	1.18%	1.10%
Medium-term notes	3,249.50	2,749.90
Floating Rate Medium-Term Notes
Debt Instrument [Line Items]
Effective borrowing rate	1.10%	0.81%
Medium-term notes	$900	$1,100

Borrowings_Additional_Informat

Borrowings - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Medium term notes	$4,149.50	$3,849.90
Interest expense on borrowings	51.8	44.2	42.3
Interest paid on borrowings	50.7	40.8	39
Medium-term Notes
Debt Instrument [Line Items]
Medium term notes outstanding amount	4,150
Registration expiration	Nov-15
Fixed Rate Medium-Term Notes
Debt Instrument [Line Items]
Medium term notes	3,249.50	2,749.90
Increase (decrease) in fair value of notes designated as hedged items	($0.50)	($0.10)

Annual_Maturities_of_Borrowing

Annual Maturities of Borrowings (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Long Term Debt Maturities Repayments Of Principal [Line Items]
2015	$2,550.60
2016	1,250
2017	1,300
2018	250
2019	300
Debt, Long-term and Short-term, Combined Amount, Total	5,650.60
Commercial Paper
Long Term Debt Maturities Repayments Of Principal [Line Items]
2015	1,500.60
Debt, Long-term and Short-term, Combined Amount, Total	1,500.60
Term Note
Long Term Debt Maturities Repayments Of Principal [Line Items]
2015	1,050
2016	1,250
2017	1,300
2018	250
2019	300
Debt, Long-term and Short-term, Combined Amount, Total	$4,150

Credit_Arrangements_Additional

Credit Arrangements - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Line of Credit Facility [Line Items]
Credit facility available amount	$3,000
PACCAR Financial Europe
Line of Credit Facility [Line Items]
Credit facility available amount	1,916.50
Other non-U.S. PACCAR financial subsidiaries
Line of Credit Facility [Line Items]
Credit facility available amount	1,083.50
Syndicated revolving loan facility
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	3,000
Syndicated revolving loan facility | Matures in June 2015
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	1,000
Line of credit, maturity date	2015-06
Syndicated revolving loan facility | Matures in June 2018
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	1,000
Line of credit, maturity date	2018-06
Syndicated revolving loan facility | Matures in June 2019
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$1,000
Line of credit, maturity date	2019-06

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Effective income tax rate	37.90%	37.80%	37.40%
Cash paid for income taxes	$3.70	$4.10	$2.20

Provision_for_Income_Taxes_Det

Provision for Income Taxes (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current provision (benefit)
Federal	$102.80	($9.70)	($1.40)
State	1.5	-1.9	5.2
Current Income Tax Expense (Benefit), Total	104.3	-11.6	3.8
Deferred (benefit) provision
Federal	-44.3	60.9	42.9
State	6.4	10.9	3.2
Deferred taxes	-37.9	71.8	46.1
Total provision for income taxes	$66.40	$60.20	$49.90

Reconciliation_Between_Statuto

Reconciliation Between Statutory Federal Income Tax Rate to Actual Provision for Income Taxes (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory rate	35.00%	35.00%	35.00%
Effect of State	3.00%	3.50%	1.90%
Effect of Other	-0.10%	-0.70%	0.50%
Effective income tax rate	37.90%	37.80%	37.40%

Deferred_Tax_Assets_and_Liabil

Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Deferred tax assets:
Allowance for losses on receivables	$21.30	$21.10
Derivative liability	1	2.2
Other	8.1	9.6
Deferred tax liabilities:
Asset capitalization and depreciation	-796.3	-835.8
Net deferred tax liability	($765.90)	($802.90)

Assets_and_Liabilities_Fair_Va

Assets and Liabilities Fair Value Measurements (Detail) (Fair Value, Inputs, Level 2, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Measurements, Nonrecurring
Assets:
Impaired loans, net of specific reserves (2014 - nil and 2013 - $.1)	$11.30	$7
Used trucks held for sale	3	8.7
Fair Value, Assets and Liabilities Measured on Recurring Basis
Assets:
Derivative contracts	0.9	1.6
Liabilities:
Derivative contracts	$3.60	$6

Assets_and_Liabilities_Fair_Va1

Assets and Liabilities Fair Value Measurements (Parenthetical) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, specific reserves	$1.30	$1.50
Fair Value, Inputs, Level 2 | Fair Value Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans, specific reserves		$0.10

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (Trucks Inventory, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Trucks Inventory
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Used truck impairments	$1	$1.60

Carrying_Amount_and_Fair_Value

Carrying Amount and Fair Value for Fixed-Rate Loans and Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets:
Loans due from affiliates	$1,288.90	$1,367.30
Liabilities:
Due to PACCAR	57.2	259.4
Foreign Finance Affiliates
Assets:
Loans due from affiliates	361	429.6
PACCAR
Assets:
Loans due from affiliates	830.5	653.6
Liabilities:
Due to PACCAR		218
Carrying Amount
Assets:
Fixed rate loans	2,619.60	2,393.10
Liabilities:
Fixed rate debt	3,249.50	2,749.90
Carrying Amount | Foreign Finance Affiliates
Assets:
Loans due from affiliates	171	216
Carrying Amount | PACCAR
Assets:
Loans due from affiliates	725.5	550.5
Liabilities:
Due to PACCAR		218
Fair Value
Assets:
Fixed rate loans	2,655.70	2,413.90
Liabilities:
Fixed rate debt	3,265.70	2,774.40
Fair Value | Foreign Finance Affiliates
Assets:
Loans due from affiliates	172	218.4
Fair Value | PACCAR
Assets:
Loans due from affiliates	730.3	554.5
Liabilities:
Due to PACCAR		$219.70

Quarterly_Results_Detail

Quarterly Results (Detail) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Interest and other revenues	$145.60	$143.40	$139.70	$134.80	$135.80	$135.70	$132.60	$140.90	$563.50	$545	$510.50
Income before income taxes	47.2	45.9	42	39.9	45.8	40.9	36.1	36.6	175	159.4	133.6
Net income	$31.80	$26.10	$26	$24.70	$28.70	$25.40	$22.40	$22.70	$108.60	$99.20	$83.70

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Outstanding commitments to fund new loan and lease transactions	$253.30
Commitments expiration term	1 year