$ORLY
O REILLY AUTOMOTIVE INC Stock $orly

$orly Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000089817319000060 Filed on February 27, 2019

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$2.191B	$2.340B	$2.291B
YoY Change	4.36%	5.35%	5.24%
Cost Of Revenue	$1.032B	$1.110B	$1.091B
YoY Change	4.72%	5.58%	3.93%
Gross Profit	$1.159B	$1.230B	$1.200B
YoY Change	4.03%	5.15%	6.47%
Gross Profit Margin	52.91%	52.58%	52.39%
Selling, General & Admin	$756.3M	$768.3M	$742.6M
YoY Change	7.05%	6.39%	5.77%
% of Gross Profit	65.24%	62.45%	61.88%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$60.30M	$58.50M	$58.00M
YoY Change	6.73%	6.36%	8.21%
% of Gross Profit	5.2%	4.75%	4.83%
Operating Expenses	$756.4M	$768.3M	$742.6M
YoY Change	7.06%	6.39%	5.77%
Operating Profit	$402.8M	$462.0M	$457.4M
YoY Change	-1.2%	3.16%	7.62%
Interest Expense	-$26.20M	-$23.70M	-$20.40M
YoY Change	48.02%	35.43%	16.57%
% of Operating Profit	-6.5%	-5.13%	-4.46%
Other Income/Expense, Net	$100.0K	-$22.43M	-$21.12M
YoY Change	-88.89%	40.95%	29.83%
Pretax Income	$376.7M	$439.5M	$436.3M
YoY Change	-3.63%	1.77%	6.73%
Income Tax	$127.4M	$155.8M	$153.5M
% Of Pretax Income	33.82%	35.45%	35.18%
Net Earnings	$302.3M	$283.7M	$282.8M
YoY Change	22.88%	1.88%	9.71%
Net Earnings / Revenue	13.8%	12.13%	12.35%
Basic Earnings Per Share	$3.56	$3.26	$3.14
Diluted Earnings Per Share	$3.52	$3.22	$3.10
COMMON SHARES
Basic Shares Outstanding	85.03M shares	86.95M shares	90.03M shares
Diluted Shares Outstanding		88.03M shares	91.30M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$46.00M	$37.00M	$27.00M
YoY Change	-68.71%	-93.39%	-93.22%
Cash & Equivalents	$46.35M	$37.29M	$26.53M
Short-Term Investments
Other Short-Term Assets	$49.04M	$34.48M	$38.20M
YoY Change	-7.52%	7.65%	12.92%
Inventory	$3.010B	$2.988B	$2.959B
Prepaid Expenses
Receivables	$216.3M	$219.6M	$203.7M
Other Receivables	$76.00M	$79.00M	$62.00M
Total Short-Term Assets	$3.398B	$3.358B	$3.290B
YoY Change	4.29%	-8.48%	-4.32%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.344B	$3.293B	$3.229B
YoY Change	7.06%	7.65%	8.4%
Goodwill	$789.1M	$787.2M	$786.9M
YoY Change	0.47%	3.96%	3.94%
Intangibles	$9.392M
YoY Change	-17.1%
Long-Term Investments
YoY Change
Other Assets	$41.35M	$40.96M	$39.77M
YoY Change	10.61%	11.78%	10.06%
Total Long-Term Assets	$4.174B	$4.121B	$4.056B
YoY Change	5.78%	6.96%	7.52%
TOTAL ASSETS
Total Short-Term Assets	$3.398B	$3.358B	$3.290B
Total Long-Term Assets	$4.174B	$4.121B	$4.056B
Total Assets	$7.572B	$7.479B	$7.346B
YoY Change	5.1%	-0.57%	1.87%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.190B	$3.154B	$3.092B
YoY Change	8.63%	5.17%	6.08%
Accrued Expenses	$146.0M	$147.0M	$130.0M
YoY Change	0.0%	5.0%	5.69%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$3.647B	$3.629B	$3.566B
YoY Change	7.25%	4.71%	5.92%
LONG-TERM LIABILITIES
Long-Term Debt	$2.978B	$2.901B	$2.604B
YoY Change	57.84%	53.77%	38.05%
Other Long-Term Liabilities	$207.7M	$204.0M	$208.1M
YoY Change	4.25%	10.0%	6.92%
Total Long-Term Liabilities	$3.186B	$3.105B	$2.812B
YoY Change	52.72%	49.85%	35.14%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.647B	$3.629B	$3.566B
Total Long-Term Liabilities	$3.186B	$3.105B	$2.812B
Total Liabilities	$6.833B	$6.733B	$6.378B
YoY Change	24.54%	21.6%	17.08%
SHAREHOLDERS EQUITY
Retained Earnings	-$612.8M	-$654.5M	-$428.2M
YoY Change	-311.69%	-216.81%	-212.81%
Common Stock	$1.266B	$1.269B	$1.298B
YoY Change	-5.36%	-5.36%	-0.98%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$653.0M	$614.2M	$869.3M
YoY Change
Total Liabilities & Shareholders Equity	$7.572B	$7.479B	$7.346B
YoY Change	5.1%	-0.57%	1.87%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$302.3M	$283.7M	$282.8M
YoY Change	22.88%	1.88%	9.71%
Depreciation, Depletion And Amortization	$60.30M	$58.50M	$58.00M
YoY Change	6.73%	6.36%	8.21%
Cash From Operating Activities	$316.3M	$376.9M	$333.8M
YoY Change	6.71%	-2.26%	2.52%
INVESTING ACTIVITIES
Capital Expenditures	-$118.1M	-$120.3M	-$116.9M
YoY Change	-1.67%	-11.41%	0.43%
Acquisitions
YoY Change
Other Investing Activities	$1.900M	$1.000M	-$800.0K
YoY Change	-103.37%	100.0%	-172.73%
Cash From Investing Activities	-$116.3M	-$119.2M	-$117.7M
YoY Change	-34.07%	-11.9%	2.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-190.9M	-246.9M	-217.2M
YoY Change	-64.24%	180.25%	-58.86%
NET CHANGE
Cash From Operating Activities	316.3M	376.9M	333.8M
Cash From Investing Activities	-116.3M	-119.2M	-117.7M
Cash From Financing Activities	-190.9M	-246.9M	-217.2M
Net Change In Cash	9.100M	10.80M	-1.100M
YoY Change	-102.2%	-93.34%	-99.65%
FREE CASH FLOW
Cash From Operating Activities	$316.3M	$376.9M	$333.8M
Capital Expenditures	-$118.1M	-$120.3M	-$116.9M
Free Cash Flow	$434.4M	$497.2M	$450.7M
YoY Change	4.3%	-4.64%	1.97%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000898173
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	78375610	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	16890003772	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	O REILLY AUTOMOTIVE INC
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2018	dei	Trading Symbol TradingSymbol	orly
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CY2017	orly	Noncompete Agreements Period Increase Decrease Total NoncompeteAgreementsPeriodIncreaseDecreaseTotal	200000	USD
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CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	14784000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	14770000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1885000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1944000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	28528000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	30915000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	122354000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	140019000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	217866000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	233845000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	258937000	USD
CY2018	us-gaap	Description Of Lessee Leasing Arrangements Operating Leases DescriptionOfLesseeLeasingArrangementsOperatingLeases	The Company leases certain office space, retail stores, property and equipment under long-term, non-cancelable operating leases. Most of these leases include renewal options and some include options to purchase, provisions for percentage rent based on sales and/or incremental step increase provisions.
CY2017Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	900000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.65
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.32
CY2018Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	1100000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	10.87
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.88
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.14
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.26
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.56
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	12.82
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.54
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.76
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	16.27
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	10.73
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.83
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.10
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.22
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.52
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	12.67
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.61
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.28
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.50
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.72
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	16.10
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	0	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-48688000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-34703000	USD
CY2016	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	547648000	USD
CY2017	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	454524000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	306262000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	14959000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	13243000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1483000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	787000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	961000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1078000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1306000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	24351000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	21687000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5615000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	785399000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	789058000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	807260000	USD
CY2017	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2017	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	3659000	USD
CY2018	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	18202000	USD
CY2016	us-gaap	Gross Profit GrossProfit	4509011000	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	1131147000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	1200062000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	1230294000	USD
CY2017Q4	us-gaap	Gross Profit GrossProfit	1159180000	USD
CY2017	us-gaap	Gross Profit GrossProfit	4720683000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	1201258000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	1288638000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	1315755000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	1234315000	USD
CY2018	us-gaap	Gross Profit GrossProfit	5039966000	USD
CY2017	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	11400000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1637191000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1637804000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1694087000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	599500000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	504000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	369600000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-53240000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-1262000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	573020000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	573231000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	355758000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-8805000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-6365000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-6538000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	35285000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	39062000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	56345000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	569677000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	496728000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	311376000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	322427000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	253265000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	177676000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	38548000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	27742000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-18138000	USD
CY2016	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	26880000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	14220000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	22903000	USD
CY2016	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	12616000	USD
CY2017	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	5430000	USD
CY2018	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	9373000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	119270000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	231802000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	163367000	USD
CY2016	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	-256000	USD
CY2017	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	3042000	USD
CY2018	us-gaap	Increase Decrease In Other Employee Related Liabilities IncreaseDecreaseInOtherEmployeeRelatedLiabilities	28022000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-13169000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	9844000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2315000	USD
CY2017	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-3600000	USD
CY2018	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	1700000	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1273000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1076000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	874000	shares
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	0	USD
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	0	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	9392000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	8444000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	7900000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	8500000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	9100000	USD
CY2016	us-gaap	Interest Expense Debt InterestExpenseDebt	70931000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	91349000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	122129000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	63648000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	77766000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	117938000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	3009800000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	3193344000	USD
CY2017Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	25706000	USD
CY2018Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	25493000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	287692000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	302772000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	320868000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7571885000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7980789000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3647366000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3894020000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1750000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	300000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	587000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	800000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2978390000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3417122000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-951320000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1039714000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1208286000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-529096000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-464223000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-534302000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1510713000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1403687000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1727555000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	1037691000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	264934000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	282821000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	283734000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	302315000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1133804000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	304906000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	353073000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	366151000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	300357000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1324487000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-62015000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-87596000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-121097000	USD
CY2017Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	76236000	USD
CY2018Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	78155000	USD
CY2018Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	47	states
CY2018Q4	us-gaap	Number Of Stores NumberOfStores	5219	stores
CY2016	us-gaap	Occupancy Net OccupancyNet	13241000	USD
CY2017	us-gaap	Occupancy Net OccupancyNet	12478000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	14449000	USD
CY2018	us-gaap	Open Tax Year OpenTaxYear	2015
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	1699206000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	403157000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	457445000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	461963000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	402835000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	1725400000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	422846000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	479150000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	485148000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	428040000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1815184000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	2429044000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	264223000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	292868000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1114603000	USD
CY2016	us-gaap	Operating Leases Rent Expense Contingent Rentals OperatingLeasesRentExpenseContingentRentals	892000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	309743000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	15600000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	208451000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	239156000	USD
CY2017	us-gaap	Operating Leases Rent Expense Contingent Rentals OperatingLeasesRentExpenseContingentRentals	1049000	USD
CY2018	us-gaap	Operating Leases Rent Expense Contingent Rentals OperatingLeasesRentExpenseContingentRentals	806000	USD
CY2016	us-gaap	Operating Leases Rent Expense Minimum Rentals OperatingLeasesRentExpenseMinimumRentals	273559000	USD
CY2017	us-gaap	Operating Leases Rent Expense Minimum Rentals OperatingLeasesRentExpenseMinimumRentals	289245000	USD
CY2018	us-gaap	Operating Leases Rent Expense Minimum Rentals OperatingLeasesRentExpenseMinimumRentals	305613000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	283253000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	298614000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	317283000	USD
CY2016	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	4439000	USD
CY2017	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	4158000	USD
CY2018	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	3585000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	49037000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	48262000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	41349000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	43425000	USD
CY2018	us-gaap	Other Information Pertaining To Income Taxes OtherInformationPertainingToIncomeTaxes	The Company’s United States federal income tax returns for tax years 2015 and beyond remain subject to examination by the Internal Revenue Service (“IRS”). The IRS concluded an examination of the O’Reilly consolidated 2014, 2015 and 2016 federal income tax returns in the third quarter of 2018. The Company’s state income tax returns remain subject to examination by various state authorities for tax years ranging from 2007 through 2017.
CY2016	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	4224000	USD
CY2017	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	2347000	USD
CY2018	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	2521000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	239187000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	253990000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	207677000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	210414000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-6434000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-11790000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-9895000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4692000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1406000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1489000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	58918000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2747000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	34818000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1505437000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2172530000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1714013000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	4125000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	7590000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3923000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	476344000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	465940000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	504268000	USD
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2016	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	1047000	USD
CY2017	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	USD
CY2018	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	499160000	USD
CY2017	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	748800000	USD
CY2018	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	498660000	USD
CY2016	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2017	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	3101000000	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	2414000000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-552000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-156000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2156000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	5119000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4464000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4784000	USD
CY2016	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	59634000	USD
CY2017	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	45762000	USD
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	72146000	USD
CY2016Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	36623000	USD
CY2017Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	44398000	USD
CY2018Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	52220000	USD
CY2017	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	79660000	USD
CY2018	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	89557000	USD
CY2017	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	87435000	USD
CY2018	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	97379000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	5191135000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	5645552000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3343806000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3587002000	USD
CY2016	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
CY2017	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	2755000000	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	2473000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-612840000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-909186000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	8593096000	USD
CY2017Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2156259000	USD
CY2017Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2290829000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2339830000	USD
CY2017Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2190808000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	8977726000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2282681000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2456073000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2482717000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2314957000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	9536428000	USD
CY2017Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	71695000	USD
CY2018Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	77012000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	2809805000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	2995283000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	3224782000	USD
CY2017Q4	us-gaap	Senior Long Term Notes SeniorLongTermNotes	2632390000	USD
CY2018Q4	us-gaap	Senior Long Term Notes SeniorLongTermNotes	3130122000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	18859000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	19401000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	20176000	USD
CY2016	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	51852000	USD
CY2017	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	49476000	USD
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	63338000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	12614000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	13466000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	14173000	USD
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	47394000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	33229000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	57168000	USD
CY2018Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	11800000000	USD
CY2018Q1	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P3Y
CY2018Q4	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P3Y
CY2018Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	1000000000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	9301000	shares
CY2018	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	6061000	shares
CY2016	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1505437000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2172530000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1714013000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	1961314000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1627136000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	653046000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	353667000	USD
CY2017	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	233.57
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	282.80
CY2017	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	2172437000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	1713953000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	36928000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	34798000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	35388000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33766000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	195000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2792000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	6116000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	6299000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3550000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	4255000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	5800000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	5500000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	5100000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	2400000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	2300000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	8051000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5709000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	6635000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	40600000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	40900000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	38900000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	96720000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	89502000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82280000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	95447000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	88426000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	81406000	shares
CY2018	orly	Schedule Of Common Shares Available For Future Issuance Under Benefit And Compensation Plans ScheduleOfCommonSharesAvailableForFutureIssuanceUnderBenefitAndCompensationPlans	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.81481481481481%;border-collapse:collapse;text-align:left;"><tr><td colspan="7" rowspan="1"></td></tr><tr><td style="width:32%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:32%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:32%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="5" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">December 31, 2018</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Plans</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Total Shares Authorized for Issuance under the Plans</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Shares Available for Future Issuance under the Plans</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Employee Incentive Plans</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">34,000</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5,573</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director Stock Plan</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,000</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">263</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Performance Incentive Plan</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">650</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">368</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Employee Stock Purchase Plans</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4,250</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">594</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Profit Sharing and Savings Plan</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4,200</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;text-indent:2px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">349</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>
CY2018	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Nature of business:</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">O’Reilly Automotive, Inc. and its subsidiaries, collectively, “O’Reilly” or the “Company,” is a specialty retailer and supplier of automotive aftermarket parts. The Company’s stores carry an extensive product line, including new and remanufactured automotive hard parts, maintenance items and various automotive accessories. As of </font><font style="font-family:inherit;font-size:10pt;">December 31, 2018</font><font style="font-family:inherit;font-size:10pt;">, the Company owned and operated </font><font style="font-family:inherit;font-size:10pt;">5,219</font><font style="font-family:inherit;font-size:10pt;"> stores in </font><font style="font-family:inherit;font-size:10pt;">47</font><font style="font-family:inherit;font-size:10pt;"> states, servicing both do-it-yourself (“DIY”) and the professional service provider customers. After the close of business on December 31, 2018, the Company acquired substantially all of the non-real estate assets of Bennett Auto Supply, Inc. and its affiliates, including </font><font style="font-family:inherit;font-size:10pt;">33</font><font style="font-family:inherit;font-size:10pt;"> stores that were not included in the 2018 store count and were not operated by the Company in 2018. The Company’s robust distribution system provides stores with same-day or overnight access to an extensive inventory of hard-to-find items not typically stocked in the stores of other auto parts retailers.</font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of estimates:</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of the consolidated financial statements, in conformity with United States generally accepted accounting principles (“GAAP”), requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates.</font></div></div>

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2017 Q4 Form 10-K Financial Statement

#000089817319000060 Filed on February 27, 2019

Income Statement

Balance Sheet

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$ORLY O REILLY AUTOMOTIVE INC Stock $orly

2017 Q4 Form 10-K Financial Statement

#000089817319000060 Filed on February 27, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ORLY
O REILLY AUTOMOTIVE INC Stock $orly