Other Assets

12 Months Ended

Dec. 31, 2012

Other Assets

Other Assets

20.   Other Assets

        Other assets consist of the following:

	December 31,
	2012		2011
	(in millions)
Deferred financing fees	$	44.7	$	72.0
Spare parts		72.7		74.5
Investments in auction rate securities		26.0		70.9
Intangible assets—net		49.6		53.4
Nonqualified employee benefit trusts		21.7		19.8
Tax related assets		29.8		—
Other		13.4		10.8
	$	257.9	$	301.4

        Deferred financing fees include amounts associated with our senior notes issued in connection with the Terra acquisition in 2010 and our credit agreement. See Note 12—Terra Acquisition and Note 22—Financing Agreements, for additional information.

        Our intangible assets are customer relationships and trademarks obtained as part of the Terra acquisition. See Note 19—Goodwill and Other Intangible Assets for additional information.