The word 'detailing' is so overused it's unreal.
Of the 1000 threads in on here of people claiming to have 'detailed' their car, i'm willing to bet less than 5% have been detailed.
There is a world of difference between detailing and cleaning your car really good.
Certainly means different things to different people, when my mrs cleans a car in a big way, its wheels off to clean the back as well, cotton buds in the air vents, polish the aircon pipes, wet sand the headlights, machine polish the paint, glass inside and out, treat all the plastics, seats out to clean underneath them, basically every little nook and cranny on the car including under the engine bay and then several coats of wax applied.
Thats still not clean as far as my cousin is concerned though, if he hasnt had it on a ramp and made sure the underside is just as clean as the top then its still not clean, but then his car has won concours events.
So everyone has a different opinion of whats clean or not.