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Credit Facilities - Additional Information (Details) $ in Millions, $ in Millions | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CAD ($) | Jul. 25, 2022 CAD ($) | Dec. 31, 2021 CAD ($)
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Disclosure of detailed information about borrowings [line items] |  |  |  |
Outstanding letters of credit |  | $ 15.7 |  | $ 15.0
Revolving Facilities |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Maximum borrowing capacity | $ 850 |  |  |
Operating loan |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Maximum borrowing capacity | 50 |  |  |
Syndicated loan |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Maximum borrowing capacity | 600 |  |  |
Subsidiary operating loan |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Maximum borrowing capacity | 10 |  |  |
Subsidiary syndicated loan |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Maximum borrowing capacity | $ 190 |  |  |
Long-Term Notes And Credit Facilities | Weighted average [member] | Effective Interest Rate |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Weighted average interest rate on Credit Facilities | 3.60% | 3.60% |  | 2.10%
LC Facility |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Outstanding letters of credit |  |  | $ 20.0 |

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- Definition Borrowing Facilities, Amount Outstanding + References No definition available. + Details
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Namespace Prefix: | bte_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Borrowing Facilities, Maximum Borrowing Capacity + References No definition available. + Details
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Namespace Prefix: | bte_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line of Credit Facility, Maximum Borrowing Capacity1 + References No definition available. + Details
Name: | bte_LineofCreditFacilityMaximumBorrowingCapacity1
Namespace Prefix: | bte_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard -URIDate 2022-03-24 + Details
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Balance Type: | na
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Balance Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Balance Type: |
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- Details
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |

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- Details
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Period Type: |

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- Details
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Period Type: |

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- Details
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Period Type: |