Short version: Trump worked with a subsidiary of a Swiss insurance concern called Chubb whose CEO was a Trump appointee during his time in office. It’s unknown what if any collateral Trump had to put up.
(I wanted to use the WaPo version, but the archive sites aren’t working for me today.)
Trump always uses other people’s money for his own gain. He will suffer nothing, not until his ass is behind bars and hopefully becomes someone’s bitch.