Debt - Term Loan Facilities (Details) ¥ in Millions, $ in Millions	Nov. 22, 2023	Mar. 31, 2025 USD ($)	Mar. 31, 2025 JPY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 JPY (¥)
USD Term Loan Facility
Debt Instrument [Line Items]
Amount outstanding		$ 139		$ 140
JPY Term Loan Facility
Debt Instrument [Line Items]
Amount outstanding		197		188
Unsecured Debt | USD Term Loan Facility
Debt Instrument [Line Items]
Amount outstanding		139		140
Unsecured Debt | JPY Term Loan Facility
Debt Instrument [Line Items]
Amount outstanding		$ 197	¥ 29,702	$ 188	¥ 29,702
Unsecured Debt | Maximum
Debt Instrument [Line Items]
Debt covenants, net debt to consolidated EBITDA ratio	3.75