Investments (Tables)

12 Months Ended

Dec. 31, 2013

Equity Method Investments And Joint Ventures [Abstract]

Investments Reported In Other Current and Non-Current Assets

The following is a summary of our investments and the related funding commitments (in millions):

	December 31, 2013				December 31,
			Funding		2012
	Assets		Commitments		Assets
Chem-Mod LLC	$	4.0	$	—	$	4.0
Chem-Mod International LLC		2.0		—		2.0
C-Quest Technology LLC		2.0		—		—
Clean-coal investments:
Non-controlling interest in three limited liability companies that own seven 2009 Era Clean Coal Plants		4.5		0.6		2.8
Controlling interest in three limited liability companies that own seven 2009 Era Clean Coal Plants		13.8		2.7		6.3
Non-controlling interest in six limited liability companies that own five 2011 Era Clean Coal Plants		12.1		—		13.2
Controlling interest in six limited liability companies that own eleven 2011 Era Clean Coal Plants		46.0		2.7		9.2
Controlling interest in a limited liability company that owns four 2011 Era Clean Coal Plants		2.3		—		5.1
Notes receivable and interest from co-investorrelated to the sales of three 2009 Era Plants		—		—		8.5
Other investments		3.7		5.4		3.0
Total investments	$	90.4	$	11.4	$	54.1