Share Repurchase Program, Accumulated Number of Shares Repurchased

No definition available.

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- Definition

Represents the amount of share repurchases accrued but unpaid under stock repurchase program.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	cf_StockRepurchaseProgramRollForward
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- Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_TreasuryStockSharesAcquired
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

+ Details

Name:	us-gaap_TreasuryStockValue
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

+ Details

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Balance Type:	debit
Period Type:	duration

- Details

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- Details

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Period Type:

Treasury Stock (Details) (USD $)	3 Months Ended			12 Months Ended	3 Months Ended
Treasury Stock (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2014	Jun. 30, 2014	Aug. 06, 2014	Sep. 30, 2012
Stock Repurchase Program [Roll Forward]
Beginning balance of treasury stock (in dollars)	$ 222,200,000us-gaap_TreasuryStockValue
Purchase of treasury stock (in dollars)	236,600,000	794,000,000
Ending balance of treasury stock (in dollars)	458,900,000us-gaap_TreasuryStockValue
Stock repurchase accrued but unpaid	29,600,000cf_StockRepurchaseAccruedButUnpaid		29,100,000cf_StockRepurchaseAccruedButUnpaid	29,100,000cf_StockRepurchaseAccruedButUnpaid
Treasury stock, shares	1,658,165us-gaap_TreasuryStockShares		846,218us-gaap_TreasuryStockShares	846,218us-gaap_TreasuryStockShares
2014 Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorized						1,000,000,000
Stock Repurchase Program [Roll Forward]
Beginning balance of accumulated number of shares repurchased (in shares)	1,400,000
Number of shares repurchased (in shares)	800,000		1,400,000	1,400,000
Ending balance of accumulated number of shares repurchased (in shares)	2,200,000		1,400,000	1,400,000
Beginning balance of treasury stock (in dollars)	372,800,000
Purchase of treasury stock (in dollars)	236,600,000		372,800,000	372,800,000
Ending balance of treasury stock (in dollars)	609,400,000		372,800,000	372,800,000
2012 Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorized							3,000,000,000
Stock Repurchase Program [Roll Forward]
Beginning balance of accumulated number of shares repurchased (in shares)		7,300,000		7,300,000
Number of shares repurchased (in shares)		3,200,000		6,300,000	3,100,000
Ending balance of accumulated number of shares repurchased (in shares)			13,600,000	13,600,000
Beginning balance of treasury stock (in dollars)		1,449,300,000		1,449,300,000
Purchase of treasury stock (in dollars)		793,900,000		1,550,700,000	756,800,000
Ending balance of treasury stock (in dollars)			$ 3,000,000,000	$ 3,000,000,000