While I realise that most people return from Bali having spent all of their Rupiah, this may interest those who still have lots of Rp leftover.
My husband had to cut his recent trip to Indonesia short (there was a typhoid epidemic at the island elsewhere in Indonesia where he surfs) so he had squillions of Rupiah (took enough for a month). While waiting at Dps Airport to come home last week he asked what the rate was to change Rp to AUD - one AUD cost Rp9K - not bad at all & way cheaper than changing back here. He was pleasantly surprised so changed most of his Rp.