CNN — After a first intervention for the fashion house’s seismic creative director John Galliano failed, Dior’s then-CEO Sidney Toledano staged a second, more serious one. It was February 2011, shortly before Galliano was set to debut what would become his final collection for Dior at Paris Fashion Week, and the designer was summoned to appear before Bernard Arnault, the chairman and CEO of LVMH, Dior’s parent company. In their conversation, Arnault stressed that if Galliano did not stop binge drinking, he would die. In response, as Toledano recounts in the new documentary “High & Low: John Galliano,” the then-50-year-old...