casualness

noun

1. (uncountable, usually)The state of being casual.
2. (uncountable, usually)A relaxed and nonchalant attitude.

   “Johnson's blacks bluffed casualness along the sides of the room and Difalco's two whites peered inconspicuously from the door.”

   “The controlled way in which Germans and other northern Europeans approach life is quite different from the casualness that characterizes American attitudes.”

   “America insulted the rest of the planet, thought Malik Solanka in his old-fashioned way, by treating such bounty with the shoulder-shrugging casualness of the inequitably wealthy.”