XML 80 R65.htm IDEA: XBRL DOCUMENT
v3.25.4

Debt and Derivatives - Schedule of Interest Rate Swap with Notional Value (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024
Matured contracts |  |
Derivative [Line Items] |  |
Derivative, Notional Amount |  | $ 2,000
Matured contracts | Credit Suisse |  |
Derivative [Line Items] |  |
Derivative, Notional Amount |  | 500
Derivative, description of terms | 3-year period ending September 30, 2025 |
Fixed rate | 3.4165% |
Matured contracts | Morgan Stanley |  |
Derivative [Line Items] |  |
Derivative, Notional Amount |  | 1,050
Derivative, description of terms | 3-year period ending September 30, 2025 |
Fixed rate | 3.42% |
Matured contracts | Credit Agricole Corporate and Investment Bank |  |
Derivative [Line Items] |  |
Derivative, Notional Amount |  | $ 450
Derivative, description of terms | 3-year period ending September 30, 2025 |
Fixed rate | 3.5241% |
Existing contracts |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 1,500 |
Existing contracts | Morgan Stanley |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 250 |
Derivative, description of terms | 3-year period ending September 30, 2028 |
Fixed rate | 3.177% |
Existing contracts | Credit Agricole Corporate and Investment Bank |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 500 |
Derivative, description of terms | 1-year period ending September 30, 2026 |
Fixed rate | 3.725% |
Existing contracts | Mizuho Capital Markets |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 500 |
Derivative, description of terms | 1-year period ending September 30, 2026 |
Fixed rate | 3.61121% |
Existing contracts | Credit Agricole Corporate and Investment Bank |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 250 |
Derivative, description of terms | 3-year period ending September 30, 2028 |
Fixed rate | 3.3315% |
Forward starting contracts |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 500 |
Forward starting contracts | Mizuho Capital Markets |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 500 |
Derivative, description of terms | 2-year period ending September 30, 2028 |
Fixed rate | 3.2022% |

X
- Definition Description of the relevant terms of the derivative. Includes the type of instrument, risk being hedged, notional amount, counterparty, inception date, maturity date, relevant interest rates, strike price, cap price, and floor price. + References No definition available. + Details
Name: | us-gaap_DerivativeDescriptionOfTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=btsg_MaturedContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=btsg_CreditSuisseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=btsg_MorganStanleyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=btsg_CreditAgricoleCorporateAndInvestmentBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=btsg_ExistingContractsInterestRateSwapAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=btsg_MizuhoCapitalMarketsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=btsg_CreditAgricoleCorporateAndInvestmentBankOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=btsg_ForwardStartingContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |