I was quite confused about this aspect. I brought it 5x that amount but on prepaid cards (actual cash was just about $700USD). I indicated on the digital form (those machines that you complete your details on at the YYZ) that I came in with more than $10k and that was it. It didn't ask in what form the money was in or anything like that. Also, no one asked me to show them the money or cards or even asked me about how much money I brought. The only thing they were concerned about was whether I had raw meat or dairy products in my luggages.
I'm worried now about depositing the money in my newly opened account cos I didn't really get a chance to "declare" it upon entry
.