XML 84 R51.htm IDEA: XBRL DOCUMENT v2.4.0.6

Background and Basis of Presentation (Details)	Mar. 31, 2012 segment
Background and Basis of Presentation
Number of business segments	2

X

- Definition

The number of reportable segments of the entity.

+ References

No definition available.

+ Details

Name:	cf_ReportingSegmentsNumber
Namespace Prefix:	cf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration