Noncontrolling Interest (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Noncontrolling interest
Balance at the beginning of the period	$ 385.9	$ 383.0
Earnings attributable to noncontrolling interest	63.3	50.6
Declaration of distribution payable	(20.9)	(6.3)
Effect of exchange rates changes	0.7	1.2
Balance at the end of the period	429.0	428.5
Distributions payable to noncontrolling interest:
Distribution payable to noncontrolling interest, balance at the beginning of the period	149.7	78.0
Distributions declared to noncontrolling interest	20.9	6.3
Distributions to noncontrolling interest	(20.9)	(6.3)
Effect of exchange rates changes	3.4	2.2
Distribution payable to noncontrolling interest, balance at the end of the period	153.1	80.2
CFL
Noncontrolling interest
Balance at the beginning of the period	16.7	17.4
Earnings attributable to noncontrolling interest	47.6	32.3
Effect of exchange rates changes	0.7	1.2
Balance at the end of the period	65.0	50.9
Distributions payable to noncontrolling interest:
Distribution payable to noncontrolling interest, balance at the beginning of the period	149.7	78.0
Effect of exchange rates changes	3.4	2.2
Distribution payable to noncontrolling interest, balance at the end of the period	153.1	80.2
TNCLP
Noncontrolling interest
Balance at the beginning of the period	369.2	365.6
Earnings attributable to noncontrolling interest	15.7	18.3
Declaration of distribution payable	(20.9)	(6.3)
Balance at the end of the period	364.0	377.6
Distributions payable to noncontrolling interest:
Distributions declared to noncontrolling interest	20.9	6.3
Distributions to noncontrolling interest	$ (20.9)	$ (6.3)