The Mosaic Co. said Jan. 28 that it intends to keep its Colonsay potash mine idled for the foreseeable future citing weak demand. It also reported that it will incur a pretax noncash charge of up to $530 million for the idling in fourth-quarter 2019. In addition, Mosaic said it will also incur up to $590 million in fourth-quarter charges on Phosphate segment goodwill.