Elasticsearch - Aggregation on multiple fields in the same nested scope

I'm aggregating product search results by tags, which have a name and ID fields. How do I get both fields back in an aggregation bucket? I can get one or the other, but I can't figure out how to get both. BTW, script access is turned off on my cluster, so I can't use that.

Here's my product mapping (simplified for this question):

"mappings": {
    "products": {
        "properties": { 
            "title": {
                "type": "string"
            },
            "description": {
                "type": "string"
            },
            "topics": {
                "properties": {
                    "id": {
                        "type": "string",
                        "index": "not_analyzed"
                    },
                    "name": {
                        "type" : "string",
                        "index": "not_analyzed"
                    }
                }
            }
        }
    }
}

Here's my query:

"query": {
    "multi_match": {
        "query": "Testing 1 2 3",
        "fields": ["title", "description"]
    },
    "aggs": {
        "Topics": {
            "terms": {
                "field": "topics.id",
                "size": 15
            }
        }
    }
}

My aggregation buckets look like this:

...the "key" value in the first bucket is the topics.id field value. Is there a way to add my topics.name field to the bucket?