A Delta Airlines Airbus A330-300, registration N830NW performing flight DL-137 from Amsterdam (Netherlands) to Detroit,MI (USA), was enroute at FL380 about 140nm northeast of Goose Bay,NL (Canada) when the crew detected oil quantity and pressure indications for the left hand engine (CF6) dropped. The crew worked the related checklists and shut the engine down, subsequently diverted to Goose Bay for a safe landing.