BS (betrayed spouse) and WS (wayward spouse) here!
First of all, I'm sorry you find yourself in a situation where you need to be here, but I'm glad you came. It's a very brave thing to confess to your husband, and the first major step in repairing your marriage.
I've been in the role of both betrayed and wayward, so I can relate to both sides. My wayward story is similar in that I made out with a man while drunk, but different in that it took me 11 years to confess. You've put yourself in a much better situation by coming clean sooner.
My husband also wants details, and I don't have many at this point, also do to intoxication. What I can tell you, coming from both sides of this, is that it's very crucial to create a safe environment for those hard, truthful conversations. Your husband has a right to be angry, but he should also know that reacting with anger when you are trying to open up is counterproductive. It wasn't until I started creating that safe environment that my husband felt safe enough to share more details of his affairs.
Also, in my case, while I might not have details, I can share perceptions, thoughts, any peripheral stuff at all. Coming forward with any and everything you can remember without making your husband pry can be really helpful.
And no trickle truth. It's so damaging.
Offer your husband access to all email accounts, phone, etc. Complete transparency is huge. Be prepared for him to ask you to ditch your friends, if they knew about and supported your ONS. Make a timeline of the events of that night, to the best of your ability, and give it to him in writing.
Do not get defensive (so hard, I know.)
I wish you both luck and healing. Consider counseling for you both, individual and marriage.