@adobe/spectrum-css/dist/components/miller/index-diff.css

The Spectrum CSS top-level backwards compatible package

.spectrum--large .spectrum-MillerColumns {
  padding: 8px 0;
}
.spectrum--large .spectrum-MillerColumns-item {
  width: 272px;
  margin-right: 8px;
}
.spectrum--large .spectrum-MillerColumns-item:first-child {
    margin-left: 8px;
  }