I'd use Path::Tiny to read the file into a variable ($xml), then Mojo::DOM to process it, e.g.

# no XML declaration, in example provided
# so no auto detect fancyness, force xml mode:

my $dom = Mojo::DOM->new->xml(1)->parse( $xml );

for my $e ( $dom->find('ENVDETAILS')->each ){
  say $e->{id};
}
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Familiarise yourself with Mojo::DOM, use it to filter the data based upon your other requirements, post your attempts and how they failed. See also this example using selectors to get just the data required.