Regulatory Matters (Tables)

12 Months Ended

Oct. 31, 2016

Public Utilities, Rate Matters [Abstract]

Regulatory assets and liabilities in the Consolidated Balance Sheets as of October 31, 2016 and 2015 are as follows.



(in millions)	2016		2015
REGULATORY ASSETS
Current Regulatory Assets
Unamortized debt expense on reacquired debt	$	0.2	$	0.2
Amounts due from customers	61.9		8.2
Environmental costs	1.5		1.5
Deferred operations and maintenance expenses	0.9		0.8
Deferred pipeline integrity expenses	3.5		3.5
Deferred pension and other retirement benefit costs	2.8		2.8
Robeson LNG development costs	0.1		0.4
Derivatives - gas supply contracts held for utility operations	41.5		—
Other	1.3		1.7
Total current regulatory assets	113.7		19.1

Noncurrent Regulatory Assets
Unamortized debt expense on reacquired debt	4.4		4.7
Environmental costs	3.6		5.1
Deferred operations and maintenance expenses	3.1		4.0
Deferred pipeline integrity expenses	32.4		29.8
Deferred pension and other retirement benefits costs	16.8		17.9
Amounts not yet recognized as a component of pension and other retirement benefit costs	151.6		114.8
Regulatory cost of removal asset	14.1		19.1
Robeson LNG development costs	—		0.1
Derivatives - gas supply contracts held for utility operations	146.4		—
Other	0.9		1.2
Total noncurrent regulatory assets	373.3		196.7
Total Regulatory Assets	$	487.0	$	215.8

Schedule of Regulatory Liabilities

Regulatory assets and liabilities in the Consolidated Balance Sheets as of October 31, 2016 and 2015 are as follows.



REGULATORY LIABILITIES
Current Regulatory Liabilities
Amounts due to customers	$	—	$	21.5

Noncurrent Regulatory Liabilities
Regulatory cost of removal obligations	538.0		521.5
Deferred income taxes	78.9		68.7
Amounts not yet recognized as a component of pension and other retirement benefit costs	0.1		0.1
Total noncurrent regulatory liabilities	617.0		590.3
Total Regulatory Liabilities	$	617.0	$	611.8

Schedule of Secondary Market Activity

This sharing mechanism for secondary market activity in all three jurisdictions for the twelve months ended October 31, 2016, 2015, and 2014 is presented below.



(in millions)	2016		2015		2014
Allocated to customers as gas cost reductions	$	52.0	$	60.1	$	72.2
Margin allocated to us	17.7		21.1		25.4
Margin from secondary market activity	$	69.7	$	81.2	$	97.6

PIEDMONT NATURAL GAS CO INC 10-K