Background and Basis of Presentation (Details) (USD $) In Billions, unless otherwise specified	3 Months Ended
Mar. 31, 2014 item	Mar. 17, 2014 Mosaic Phosphate mining and manufacturing business
Principal nitrogen segment assets
Cash consideration		$ 1.4
Number of business segments	2

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration