75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Statements of Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Statements of Changes in Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 75030 - Disclosure - Plan Description link:presentationLink link:calculationLink link:definitionLink 75040 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 75050 - Disclosure - Fair Value Measurement link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Related Party Transactions and Party-In-Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75070 - Disclosure - Nonexempt Party-In-Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75080 - Disclosure - Income Tax Status link:presentationLink link:calculationLink link:definitionLink 75090 - Disclosure - Plan Termination link:presentationLink link:calculationLink link:definitionLink 75100 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 75110 - Disclosure - Schedule of Assets (Held at End of Year) link:presentationLink link:calculationLink link:definitionLink 75120 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 75130 - Disclosure - Fair Value Measurement (Tables) link:presentationLink link:calculationLink link:definitionLink 75140 - Disclosure - Schedule of Assets (Held at End of Year) (Tables) link:presentationLink link:calculationLink link:definitionLink 75150 - Disclosure - Plan Description - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75160 - Disclosure - Fair Value Measurement - Summary of By Level Within Fair Value Hierarchy, Plan's Assets Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 75170 - Disclosure - Fair Value Measurement - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75180 - Disclosure - Related Party Transactions and Party-In-Interest Transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75190 - Disclosure - Income Tax Status - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) [Default] link:presentationLink link:calculationLink link:definitionLink Note receivable from participant, account, maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Percentage of increments in number of investment fund options Percentage of Increments in Number of Investment Fund Options Percentage of increments in number of investment fund options. EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Reduction of employer contributions EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses BAT Stock Fund [Member] BAT Stock Fund. BAT Stock Fund EBP, Net Asset Available for Benefit Net assets available for benefits Net assets available for benefits at beginning of year Net assets available for benefits at end of year Minimum [Member] Minimum Former Employees of Lorillard Tobacco Company [Member] Former Employees of Lorillard Tobacco Company. Former Employees of Lorillard Tobacco Company EBP, Schedule of Asset Held for Investment [Table] EBP, Tax Status [Line Items] EBP, Payment to Participant [Policy Text Block] Payment of Benefits EBP, Description of Plan and Accounting Change [Abstract] Percentage of compensation for pre-tax, Roth and after-tax contributions Employee Benefit Plan Participant Contribution, Pretax After Tax Contributions to Compensation, Percentage Employee Benefit Plan Participant Contribution, Pretax After Tax Contributions to Compensation, Percentage. Employee Benefit Plan Administrative Fees Employee benefit plan administrative fees. Employee benefit plan administrative fees EBP, Investment Sale, Receivable Due from broker for securities sold Document Period End Date Document Information [Table] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Investments [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] Employee Benefit Plan Participant Contribution Pre tax Contributions And Roth Contributions After Tax Compensation Percentage Employee Benefit Plan Participant Contribution Pre tax Contributions And Roth Contributions After Tax Non Bonus Compensation Percentage. Percentage of participant contribution pre tax contributions and roth contributions after tax non bonus compensation EBP, Employer Contribution, Receivable Employer contributions EBP, Self-Directed Brokerage Account [Member] Participant Self-directed Brokerage Account EBP, Note Receivable from Participant Notes receivable from participants Nonexempt Party-In-Interest Transactions [Line Items] Nonexempt Party-In-Interest Transactions. Income Tax Status EBP, Tax Status [Text Block] EBP, Liability Total liabilities EBP, Use of Estimate [Policy Text Block] Use of Estimates EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment income: EBP, Accounting Policy [Table] EBP, Investment [Policy Text Block] Investment Valuation and Income Recognition Common Collective Trust [Member] Common/Collective Trust Funds EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income on notes receivable from participants Statistical Measurement [Axis] Money Market Funds [Member] Money Market Funds EBP, Employer Contribution, Participant Compensation Matched, Percentage Percetange of matching contributions EBP, Basis of Accounting [Policy Text Block] Basis of Accounting Not Accruing Benefit Under Former Reynolds American Retirement Plan [Member] Not Accruing Benefit Under Former Reynolds American Retirement Plan. Not Accruing Benefit Under Former Reynolds American Retirement Plan Fair Value, Inputs, Level 3 [Member] Level 3 Text Block [Abstract] EBP, Investment, Fair Value and NAV [Table Text Block] Summary of By Level Within Fair Value Hierarchy, Plan's Assets Fair Value Employee Benefit Plan Provision For Income Taxes Employee benefit plan provision for income taxes. Provision for income taxes Participant loans EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Stable value collective trust fund [Member] Stable value collective trust fund. Stable Value Collective Trust Fund Employee Benefit Plan Fund Held Per Shares Employee benefit plan fund held per shares. Employee benefit plan fund held per shares EBP, Change in Net Asset Available for Benefit, Increase Total additions Percentage of participant contribution pre tax contributions and roth contributions after tax bonus compensation Employee Benefit Plan Participant Contribution Pre tax Contributions And Roth Contributions After Tax Bonus Compensation Percentage Employee Benefit Plan Participant Contribution Pre tax Contributions And Roth Contributions After Tax Bonus Compensation Percentage ASC Retirement Enhancement Contributions ASC Retirement Enhancement Contributions [Member] ASC Retirement Enhancement Contributions. Fair Value Hierarchy and NAV [Axis] EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Deductions: EBP, Description of Plan [Line Items] EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total contributions Document Fiscal Period Focus EBP, Schedule of Asset Held for Investment [Abstract] EBP, Change in Net Asset Available for Benefit, Decrease Total deductions EBP, Liability [Abstract] Liabilities: EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Accrued Expense Accrued administrative expenses EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Note receivable from participant, account, maximum borrowing, amount Fair Value, Inputs, Level 1 [Member] Level 1 Investment Type [Axis] Employee Benefit Plan Uncertain Tax Positions Employee benefit plan uncertain tax positions. Uncertain tax positions EBP, Investment, Current Value, Type [Extensible Enumeration] Maturity dates EBP, Asset Held for Investment, Participant Loan, Maturity Date Statistical Measurement [Domain] Entity Central Index Key EBP, Asset Held for Investment, Participant Loan, Interest Rate Interest rates Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] EBP, Plan Termination [Text Block] Plan Termination Number of loans Employee Benefit Plan Investment Number of Individual Loans Employee benefit plan investment number of individual loans. Fair Value, Inputs, Level 2 [Member] Level 2 EBP, Statement of Net Asset Available for Benefit [Table] EBP, Accounting Policy [Line Items] EBP, Investment, Fair Value and NAV [Abstract] Fair Value Hierarchy and NAV [Domain] EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Interest and dividends EBP, Related Party and Party-in-Interest Transactions [Text Block] Related Party Transactions and Party-In-Interest Transactions Employee Benefit Plan Fund Dividends Employee benefit plan fund dividends. Employee benefit plan fund dividends EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase in net assets available for benefits EBP, Asset [Abstract] Assets: Document Type EBP, Description of Plan [Table] EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Participant contributions EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment, Total Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Employer contributions Entity Registrant Name EBP, Description of Plan [Text Block] Plan Description EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Table] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] EBP, Investment, Number of Shares Par value or number of units Employee benefit plan fund held shares EBP, Tax Determination Letter, Date Tax determination letter date Interest and dividends Employee Benefit Plan Interest and Dividends Employee benefit plan interest and dividends. EBP, Plan Number EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Total investment income EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Ending Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Beginning Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Total Investments at fair value Total investments at fair value Total investments EBP, Tax Status [Abstract] Mutual Fund [Member] Mutual Fund EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants EBP, Receivable Total receivables EBP, Statement of Net Asset Available for Benefit [Line Items] Fidelity money market fund [Member] Fidelity money market fund. Fidelity Money Market Fund Employee Benefit Plan Participant Contribution Payroll Deductions Bonus Compensation Percentage Employee Benefit Plan Participant Contribution Payroll Deductions Bonus Compensation Percentage. Percentage of participant payroll deductions contributions bonus compensation EBP, Forfeited Nonvested Account Forfeited nonvested accounts Entity Tax Identification Number EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Note receivable from participant, account, minimum borrowing, amount EBP, Note Receivable from Participant [Policy Text Block] Valuation of Notes Receivable from Participants Entity [Domain] Percentage of participant contributions non-bonus compensation Employee Benefit Plan Participant Contribution, Pretax, Non Bonus Compensation, Percentage Employee Benefit Plan Participant Contribution, Pretax, Non Bonus Compensation, Percentage. EBP, Schedule of Asset Held for Investment [Text Block] Schedule of Assets EBP, Related Party and Party-in-Interest Transactions [Line Items] Maximum [Member] Maximum ASC Employees ASC Employees [Member] ASC Employees. Employee Benefit Plan Participant Contribution Different Contribution Compensation Percentage Employee Benefit Plan Participant Contribution Different Contribution Compensation Percentage. Participant different contribution percentage bonus compensation EBP, Liability for Investment Purchase Due to broker for securities purchased Santa Fe Employees [Member] Santa Fe Employees. Santa Fe Employees EBP, Investment, Fair Value and NAV [Text Block] Fair Value Measurement EBP, Asset Total assets Nonexempt Party-In-Interest Transactions [Text Block] Nonexempt party-in-interest transactions. Nonexempt Party-In-Interest Transactions Document Fiscal Year Focus EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Percentage of pre-tax and/or Roth contributions Santa Fe Retirement Enhancement Contributions [Member] Santa Fe Retirement Enhancement Contributions. Santa Fe Retirement Enhancement Contributions EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions: EBP 001 [Member] EBP 001. EBP 001 Amendment Flag Cash Management Account Money Market Fund [Member] Cash management account - money market fund. Cash Management Account Money Market Fund Employee Benefit Plan transfers of assets between levels within fair value hierarchy Employee Benefit Plan transfers of assets between levels within fair value hierarchy Transfers of assets between levels within fair value hierarchy EBP, Tax Determination Letter, Obtained [true false] EBP, Subsequent Event [Text Block] Subsequent Events EBP, Tax Status [Table] Investment, Identifier [Axis] EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Participant rollover contributions EBP, Receivable [Abstract] Receivables: EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Legal Entity [Axis] Nonexempt Party-In-Interest Transactions [Table] Nonexempt Party-In-Interest Transactions. Common/collective Investment Trust Common/Collective Investment Trust [Member] Common/Collective Investment Trust. EBP, Asset Held for Investment, Party-in-Interest [true false] Cover [Abstract] EBP, Asset Held for Investment EBP, Asset Held for Investment, Total Total assets EBP, Contribution, Participating Employer [Domain] Percentage of participant contributions bonus compensation Employee Benefit Plan Participant Contribution Pretax Bonus Compensation Percentage Employee Benefit Plan Participant Contribution Pretax Bonus Compensation Percentage. EBP, Investment, Fair Value and NAV [Table] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Contribution, Participating Employer [Axis] EBP, Investment, Fair Value and NAV [Line Items] BAT American Depository Shares [Member] BAT American Depository Shares. BAT American Depository Shares Employee Benefit Plan Participant Contribution Payroll Deductions Non Bonus Compensation Percentage Employee Benefit Plan Participant Contribution Payroll Deductions Non Bonus Compensation Percentage Percentage of participant payroll deductions contributions non bonus compensation EBP, Statement of Change in Net Asset Available for Benefit [Table] Employee Benefit Plan Schedule Of Assets Held At End Of Year [Text Block] Employee benefit plan schedule of assets held at end of year. Schedule of Assets (Held at End of Year) EBP, Subsequent Event [Abstract] Accruing Benefit Under Former Reynolds American Retirement Plan [Member] Accruing Benefit Under Former Reynolds American Retirement Plan. Accruing Benefit Under Former Reynolds American Retirement Plan Document Information [Line Items] Dodge and Cox International Stock [Member] PIMCO Income A. BTC Lifepath 2030 J [Member] Unitized Company Stock Fund. BTC Lifepath Retirement J [Member] JP Morgan Disciplined Equity Fund Class R6. T. Rowe Price Global Growth Equity Trust A [Member] BTC Lifepath 2035 J [Member] BTC Lifepath 2045 J. BAT Stock Fund Fidelity Money Market Fund [Member] BAT Stock Fund BAT American Depository Share. BTC Lifepath 2040 J [Member] Self Directed Brokerage Accounts. Fidelity Retirement Money Market Fund [Member] Unitized Company Stock Fund [Member] BTC Lifepath 2030 J. PIMCO Income A [Member] BTC Lifepath 2060 J [Member] BTC Lifepath Retirement J. Vanguard Institutional Total Stock Market Index Trust. PIMCO Total Return Fund. Avantis U.S. Small Cap Equity Fund Institutional [Member] PIMCO Total Return Fund [Member] Self Directed Brokerage Accounts [Member] BAT Stock Fund Fidelity Money Market Fund. BTC Lifepath 2055 J [Member] BTC Lifepath 2055 J. Fidelity Retirement Money Market Fund. JOHCM GLB EM OPS IS. BTC Lifepath 2040 J. BAT Stock Fund BAT American Depository Share [Member] Vanguard Institutional Total Bond Market Index Trust [Member] Dodge and Cox International Stock. Vanguard Institutional Total Stock Market Index Trust [Member] JOHCM GLB EM OPS IS [Member] BTC Lifepath 2065 J. BTC Lifepath 2045 J [Member] T. Rowe Price Global Growth Equity Trust A. Avantis U.S. Small Cap Equity Fund Institutional. BTC Lifepath 2035 J. PIF DVRSD REAL AST I. BTC Lifepath 2065 J [Member] Galliard Stable Return Fund W (Interest Income Fund) [Member] Vanguard Institutional Total International Stock Market Index Trust [Member] Vanguard Institutional Total Bond Market Index Trust. Galliard Stable Return Fund W (Interest Income Fund). JP Morgan Disciplined Equity Fund Class R6 [Member] Vanguard Institutional Total International Stock Market Index Trust. BTC Lifepath 2050 J. BTC Lifepath 2050 J [Member] BTC Lifepath 2060 J. PIF DVRSD REAL AST I [Member]