Item 2. PROPERTIES

As of December 31, 2018, we owned or leased a total of approximately 32 million square feet of space worldwide. Manufacturing and assembly operations are conducted in 52 plants across the world. We also maintain various warehouses, offices and repair centers throughout the world. The majority of our plant facilities are owned by us with the remainder under long-term lease arrangements. We believe that our plants have been well maintained, are generally in good condition and are suitable for the conduct of our business.

The locations by segment of our principal plant facilities at December 31, 2018 were as follows: