http://www.marketwatch.com/story/apple-saved-41-billion-hedging-against-a-rising-dollar-says-stifel-2015-12-14

Apple’s exposure to the global market is substantial. They currently make about 65% of their revenue outside of the US.  China alone accounts for approximately 24%. Since Apple is a multi-billion dollar business, they invest heavily in contracts and futures to limit their overall risk. It looks like their strategy is working out for them as they saved $4.1B in 2015 Q4.