Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of regulatory assets and reserves for manufactured gas plant sites

We have established the following regulatory assets and reserves related to manufactured gas plant sites:

(in millions)	September 30, 2015		December 31, 2014
Regulatory assets	$	676.2	$	45.9
Reserves for future remediation	611.3		32.6