There's no doubt that Apple's use of debt has drawn as much criticism as it has praise. At the end of April, Apple opted to dive into the historically cheap debt markets rather than tap into its massive cash balances overseas. This bold move drew the ire of many, including the U.S. Senate, who asked Apple CEO Tim Cook to testify on Capitol Hill in the wake of the announcement. 

As the weeks go on since the issuance, it's becoming increasingly clear that Apple's use of debt was a bright idea. As the bond market has subsequently headed south, it's now clear Apple investors saved some serious cash as a result of its gutsy call. Just how much exactly? Fool contributor Andrew Tonner tells investors in the video below.

Fool contributor Andrew Tonner owns shares of Apple. Follow Andrew and all his writing on Twitter: @AndrewTonnerThe Motley Fool recommends Apple. The Motley Fool owns shares of Apple. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.