$VAR1 = {
    'ClickFraudReport' => {
        'Name' => 'Click Fraud Report',
        'TimeRange' => 'Thursday, November 23, 2006 - Wednesday, November 29, 2006'.
        'Campaigns' => [
            {
                'Name' => 'Google 140',
                'Cost' => '$330.14',
                # etc
            },
            {
                # etc
            },
         ],
    },
};

##</code><code>##

my $report = $res->result;
foreach my $campaign ( @{ $report->{ClickFraudReport}{Campaigns} } ) {
    print $campaign->{Name};
    print $campaign->{Cost};
}