MEDICARE PART D (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Cms Subsidies Or Discounts
Product Information [Line Items]
Net assets (liabilities)	$ 455	$ 530
Cost Sharing Settlements Medicare Part D
Product Information [Line Items]
Net assets (liabilities)	$ (167)	$ 126

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