How can they borrow against that cash that's overseas? Wouldn't the lender be thinking that Apple has to pay 20% in taxes to repatriate the cash in the event of

How can they borrow against that cash that's overseas? Wouldn't the lender be thinking that Apple has to pay 20% in taxes to repatriate the cash in the event of an emergency? Is Apple able to borrow more than 80% of the value of cash they have overseas?