Almost five hours in length, the two-part look at the hard-to-pin-down artist flows effortlessly, making for a riveting watch even for those coming to it with little affection for his work.

When it comes to Billy Joel’s music, it’s still Bach and roll to him. In an exclusive preview clip from the new HBO documentary “Billy Joel: And So It Goes” that aired July 18 on TODAY, the "Piano Man" explains how classical music shaped the songs he has made during his decadeslong career.

Billy Joel is opening up about one of the most complicated chapters of his life in his new documentary, "Billy Joel: And So It Goes."

Piano Man Billy Joel opened up about falling for his best friend's wife in a new documentary, "Billy Joel: And So It Goes," premiering July 18.

Alexa Ray Joel watched the new documentary about her father, 'Billy Joel: And So It Goes,' with mom Christie Brinkley. The film premieres in two parts on July 18 and July 25, on HBO Max.