Noncontrolling Interests (Details 2) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Noncontrolling interest
Balance at the beginning of the period			$ 383.0	$ 16.0
Terra Acquisition				373.0
Earnings attributable to noncontrolling interest	51.5	23.0	158.5	65.1
Declaration of distribution payable			(45.9)	(16.7)
Effect of exchange rates changes			(8.6)	0.8
Balance at the end of the period	487.0	438.2	487.0	438.2
Distributions payable to noncontrolling interest:
Distribution payable to noncontrolling interest, balance at the beginning of the period			78.0	92.1
Declaration of distributions payable			45.9	16.7
Distributions to noncontrolling interests			(127.4)	(110.5)
Effect of exchange rates changes			3.5	1.7
CFI
Distributions payable to noncontrolling interest:
Distribution payable to noncontrolling interest, balance at the beginning of the period				92.1
Distributions to noncontrolling interests			153.0	182.3
TNCLP
Noncontrolling interest
Balance at the beginning of the period			365.6
Terra Acquisition				373.0
Earnings attributable to noncontrolling interest			51.5	16.7
Declaration of distribution payable			(45.9)	(16.7)
Balance at the end of the period	371.2	373.0	371.2	373.0
Distributions payable to noncontrolling interest:
Declaration of distributions payable			45.9	16.7
Distributions to noncontrolling interests			(45.9)	(16.7)
CFL
Noncontrolling interest
Balance at the beginning of the period			17.4	16.0
Earnings attributable to noncontrolling interest			107.0	48.4
Effect of exchange rates changes			(8.6)	0.8
Balance at the end of the period	115.8	65.2	115.8	65.2
Distributions payable to noncontrolling interest:
Distribution payable to noncontrolling interest, balance at the beginning of the period			78.0	92.1
Distributions to noncontrolling interests			(81.5)	(93.8)
Effect of exchange rates changes			$ 3.5	$ 1.7