philosophical: of, relating to, or based on philosophy; having a calm attitude toward a difficult or unpleasant situation; characterized by the attitude of a philosopher; calm or unflinching in the face of trouble, defeat, or loss.
„They got into a philosophical debate about what it means for something to be natural.“ And „He’s trying to be philosophical about their decision since he knows he can’t change it.“ First known use 14th century.
Synonyms: abstract, logical, metaphysical, profound, rational, thoughtful. Also: calm, composed, deep, learned, resigned, stoic, serene, temperate. (MerriamWebster)
Being philosophical in the American context if often considered to be detached, abstract, impractical, unpragmatic, even arrogant.