So I think what's actually going on.... Ford Credit and Ford are separate legal entities. Ford Credit is tendering $1.3 billion to purchase Ford's unsecured, nonconvertible debt (unsecured means that it is not secured by any of Ford's assets... essentially it makes the debt more risky, and nonconvertible means that Ford Credit will not have the option of converting the Ford debt/bonds into common stock of the company). They are doing this to infuse capital into Ford (give them money essentially) as the quote says:
"It is in Ford Credit's best interest to advance Ford's long-term financial stability as it will strengthen our ability to profitably support the sale of Ford products." The $8.9 billion outstanding means that there are still owners out there of $8.9 billion in similar Ford debt. The $500 million offer to purchase Ford's senior secured (senior means this debt is paid back first, before 'subordinate' debt, and secured means the opposite of what I mentioned above... so it is secured by assets of some kind) term loan debt.
Now... this part:
Any Notes acquired by Ford Credit will be retired in settlement of existing intercompany tax liabilities to Ford or in distributions to Ford. Any Term Loan Debt acquired by Ford Credit is expected to be distributed to its parent, Ford Holdings LLC, and forgiven. These payments and distributions by Ford Credit are consistent with its previously announced plans to return capital to Ford.
I believe it is saying that the Notes (the $1.3 billion portion) that Ford Credit acquires will be retired, meaning Ford is not liable to pay them back, in exchange for also retiring some money that Ford Credit owes Ford. The Term Loan Debt portion sounds like it is being given back to Ford and forgiven, so they don't need to pay that back either. Essentially, the capital arm of Ford is giving money to the parent, Ford, to help with their mandated restructuring.
Let me know if that just confused you even more!