Details vary by country, but in the three countries I've lived in 100% of your salary. It's paid by social security, even if your salary is in the seven figures, then you also paid a high amount to social security to cover for it.
I think the US would have a long way to go before the public would ever accept having 7+ figure salaries paid out of the taxpayer pocket. That's pretty cool that some countries do though I see some of them only offer the 100% to women and not men.
edit: here's a table with more details https://en.wikipedia.org/wiki/Parental_leave#Europe_.28inc._...