MOUNTAIN VIEW (CNN) — Alphabet for the first time disclosed the size of various business units within Google, including YouTube advertising, which in 2019 was a $15 billion business.

YouTube’s sales have grown 36% from 2018 and 86% since 2017.

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The company has historically only broken out the finances for Google’s advertising business and the “other” areas of Google’s business, which lump together such key segments as YouTube and cloud.

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The company’s stock dropped around 3% Monday after it narrowly missed Wall Street analysts’ overall revenue projections for the three months ending in December. Alphabet posted total revenue of $46 billion for the quarter, up 17% from the same period in the prior year.

Analysts had projected annual revenue of $46.9 billion.

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