https://www.marriott.com/rewards/mem...s/guarantee.mi

As long as your preferences are noted on your reservation, we will always give you the room type you request, unless you find an upgrade, suite, or other room type satisfactory. If we fail to deliver your preferred room type, we'll give you a cash reimbursement. (Reimbursement varies by hotel brand.)
*North America only for Gold members

That means $100 FS, $50 CY, and $25 FI & SHS