IMHO it depends on the type of engine on the 'craft. Back in the old days on the 727, power was never put to idle until close to the landing. These were not "fan" engines. In today's big fan engines, where the fan produces 75% of the thrust, I would start to reduce power at 50 feet and be at idle by30 feet, raise the nose to 6 degrees on the horizon and kiss the ground softly. Couldn't do that on the 727.
T