Property, Plant and Equipment, Significant Sales (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended	12 Months Ended				1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Crystal Holding L.L.C. [Member]	Dec. 31, 2012 Crystal Holding L.L.C. [Member]	Dec. 31, 2011 Crystal Holding L.L.C. [Member]	Dec. 31, 2010 Crystal Holding L.L.C. [Member]	Nov. 30, 2011 Crystal Holding L.L.C. [Member]	Feb. 28, 2011 Marine transportation assets [Member]	Dec. 31, 2012 Marine transportation assets [Member]	Dec. 31, 2011 Marine transportation assets [Member]	Dec. 31, 2010 Marine transportation assets [Member]
Significant Acquisitions and Disposals [Line Items]
Proceeds from disposal of assets	$ 1,198.8	$ 1,053.8	$ 105.9	$ 547.8	$ 0	$ 547.8	$ 0		$ 53.2	$ 0	$ 53.2	$ 0
Gains attributable to disposal of assets	86.4	155.7	46.7	129.1	0	129.1	0		3.3
Depreciation, amortization and accretion	1,104.9	1,007.0	985.1			19.7	30.5
Property, plant and equipment, net (see Note 8)	24,846.4	22,191.6	19,332.9					356.2
Total assets	$ 35,934.4	$ 34,125.1						$ 411.9