CVS Health (CVS) said Monday it has started cash tender offers for some outstanding notes issued by the company and its unit Aetna.

CVS said the tender offers are for any and all of its 4.1% senior notes due 2025 and other notes as long as the purchase price across both tenders doesn't exceed $2 billion.

CVS said the other notes are: its 2.7% notes due 2040, the 3.875% notes due 2047 issued by Aetna, its 4.25% notes due 2050, the 4.125% notes due 2042 issued by Aetna, its 4.125% notes due 2040, its 2.125% notes due 2031, its 1.875% notes due 2031, its 5.05% notes due 2048, the 4.5% notes due 2042 issued by Aetna, and its 1.75% notes due 2030.

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