In a large bowl, whisk together the flour, sugar, and salt to combine. Add the chilled butter and shortening and toss in the flour to coat well.
Cut the butter and shortening into the flour using a pastry cutter (a fork or two butter knives will also work). Stop when you have a coarse meal with pea-sized pieces of butter and shortening (some larger/smaller pieces are fine). Slowly pour ½ of the cold water/vinegar mixture into the flour while gently stirring with a spoon or spatula to combine. Add the remaining water/vinegar mixture and gently stir again. The dough should start to come together with loose bits of flour at the bottom. Squeeze some dough in your hands to see if holds together. It should feel somewhat dry, but moist enough to stay together when pinched (some falling crumbs are fine) The dough shouldn't be sticky or wet. If it needs more moisture, add 1-2 teaspoons of cold water at a time until it comes together. Gently knead the dough just 2-3 times in the bowl into a ball. The loose crumbs should stick, but if they don't, you can sprinkle cold water on them with your fingers.
Form the dough into a 1-inch thick disk and wrap it in cling wrap. Chill for 3-4 hours or up to 3 days. Before rolling, let the dough sit on the counter for 5-8 minutes to slightly soften (as long as it's not hot in your kitchen).
Lightly flour your work surface and rolling pin. Place your dough onto your work surface. Starting in the center of the disc, firmly roll away from you in one stroke. Then rotate dough clockwise and repeat. Keep repeating until the dough is about 2-3 inches longer than your pie pan and about ¼" thick. Lightly flour pin as needed and check under the dough to see if you need more flour to prevent sticking.
When finished, brush off any extra flour and roll the dough onto your rolling pin. Place over your pie pan and gently unroll the dough on top. Fit the dough evenly into the pan using your hands (don't stretch). Trim dough evenly around the edge, leaving 1 ½ inches of overhang.
Fold the edges downwards and press together evenly along the pie plate. You can leave it like this or you can flute the edges by pressing the dough into your thumb, using your index finger and thumb of your other hand.
Place the pie pan back in the freezer for 15 minutes. From here, you can follow the instructions of your recipe or you can wrap your crust and store in the fridge or freezer until ready for use. See note for blind baking instructions.