Beyond the iPhone
Apple
Apple’s services segment accounted for $37 billion in revenue in Apple's fiscal 2018 (which ended September 29, 2018), making it the second largest contributor to overall sales behind the company’s cash cow, the iPhone, which accounted for 63 percent of total sales.
With Apple Music, Apple Pay, iTunes and the App Store as well as iCloud and Apple Care, Apple’s services business has become a beast of its own in recent years, more than doubling from $16.1 billion in sales in 2013 to $37 billion in 2018. The company’s ambitions go much further than that though, as Apple executives have said they plan to hit a target of $50 billion in services revenue by 2021.

Description
This chart shows Apple's non-iPhone revenue by product group for the fiscal years 2015 to 2018.