I believe that it's one of the variegated needlepoint English ivies, Hedera helix (digitata). There are numerous cultivars of this form. At first I thought it was the Glacier English Ivy, but the leaves seem to be a little too 'pointy'. ;-)

I never take my indoor plants outside, either. We are much in the minority in this forum!

Pretty stained glass panel.

Hey Cactus...At first glace I thought it was Algerian variegata, then Needlepoint came to mind.

It's a beautiful Ivy.

I found this link, which may or may not help. Since yours has 3 lobes, the species can be narrowed down.
Scroll down to 'Species and Named Varieties.'

http://www.plant-care.com/hedera-i228.html

Toni