Filevault 2 enabled with recovery key linked to apple id, can I get the key?

I enabled FileVault on my Yosemite mac, and selected the 'allow apple ID to reset password' option.

I paid attention to all the dialogs and though they said to write down my recovery key, it was never shown to me.

Did something go wrong? When I did this years ago with FileVault 1 I was shown the key.

I tested using the apple ID password change function and it seemed to work OK but I'd like to have a copy of the key written down as an extra safety measure.