Income Taxes - Cash Paid For Income Taxes, Net of Refunds (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Paid, by Individual Jurisdiction [Line Items]
Federal	$ 1	$ 4	$ 3
Provincial	43	2	1
Total cash paid for income taxes, net	194	116	50
Aggregated Other Jurisdictions
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	16	14	10
Ireland
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	116	60	27
Singapore
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	10	5	0
United States
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	$ 8	$ 31	$ 9

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Amount, after income tax refund received, of cash paid to federal (national) tax jurisdiction for tax on income.

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Amount, after refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax.

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