If he is serious about working a program, you need to be working one as well. It will be a difficult, uphill battle. When the A first gets off the bottle, even after detox, the craving can be very challenging. You'll need a program to cope with the same mood swings, irritability, and unpredictability he'll exhibit while fighting to maintain sobriety. Just because they stop drinking does not mean their behaviors suddenly change for the better.
Maintain your hope and let him know you will be there to support his efforts. I pray for both of you that his recovery will a successful one.