Investments (Tables)

9 Months Ended

Sep. 30, 2015

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):

	September 30, 2015				December 31,
			Funding		2014
	Assets		Commitments		Assets
Chem-Mod LLC	$	4.0	$	—	$	4.0
Chem-Mod International LLC		2.0		—		2.0
C-Quest Technologies LLC and C-Quest Technologies International LLC		—		—		—
Clean-coal investments:
Controlling interest in five limited liability companies that own fourteen 2009 Era Clean Coal Plants		14.8		—		17.3
Non-controlling interest in one limited liability company that owns one 2011 Era Clean Coal Plant		0.9		—		1.0
Controlling interest in fifteen limited liability companies that own nineteen 2011 Era Clean Coal Plants		57.2		5.7		54.5
Other investments		2.6		2.9		3.2
Total investments	$	81.5	$	8.6	$	82.0