Derivative Instruments - Narrative (Details) $ in Millions, ₡ in Billions	12 Months Ended
Dec. 31, 2025 USD ($)	Dec. 31, 2025 CRC (₡)
Interest Rate Swap \| Cable & Wireless Communications Limited (C&W)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 3,630
Derivative floor interest rate (as a percent)	0.00%	0.00%
Weighted average remaining life (in years)	4 years 7 months 6 days
Basis Swap \| Cable & Wireless Communications Limited (C&W)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 1,180
Weighted average remaining life (in years)	2 months 12 days
Foreign currency forward contracts \| Costa Rice Borrowing Group
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 191	₡ 100
Weighted average remaining life (in years)	6 months
Measurement Input, Counterparty Credit Risk
Derivative Instruments, Gain (Loss) [Line Items]
Exposure to counterparty credit risk	$ 21

Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions.

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Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

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Nominal or face amount used to calculate payment on derivative.

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