Fair Value of Financial Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Gross Notional Amounts of Commodity Forwards and Options

The following table details the gross notional amounts of commodity forwards and options at March 31, 2018 and Dec. 31, 2017:


^(a)	Amounts are not reflective of net positions in the underlying commodities.


^(b)	Notional amounts for options are included on a gross basis, but are weighted for the probability of exercise.

Impact of Derivative Activity on Accumulated Other Comprehensive Loss, Regulatory Assets and Liabilities, and Income

The following tables detail the impact of derivative activity during the three months ended March 31, 2018 and 2017 on accumulated other comprehensive loss, regulatory assets and liabilities, and income:



	Three Months Ended March 31, 2018
	Pre-Tax Fair Value Losses Recognized During the Period in:					Pre-Tax Losses Reclassified into Income During the Period from:
(Thousands of Dollars)	Accumulated Other Comprehensive Loss		Regulatory (Assets) and Liabilities			Accumulated Other Comprehensive Loss			Regulatory Assets and (Liabilities)			Pre-Tax Gains (Losses) Recognized During the Period in Income
Derivatives designated as cash flow hedges
Interest rate	$	—	$	—		$	398	^(a)	$	—		$	—
Total	$	—	$	—		$	398		$	—		$	—
Other derivative instruments
Commodity trading	$	—	$	—		$	—		$	—		$	524		^(b)
Natural gas commodity	—		(171		)	—			2,749		^(c)	(1,581		)	^(c)
Total	$	—	$	(171	)	$	—		$	2,749		$	(1,057	)




	Three Months Ended March 31, 2017
	Pre-Tax Fair Value Losses Recognized During the Period in:					Pre-Tax Losses Reclassified into Income During the Period from:
(Thousands of Dollars)	Accumulated Other Comprehensive Loss		Regulatory (Assets) and Liabilities			Accumulated Other Comprehensive Loss			Regulatory Assets and (Liabilities)			Pre-Tax Gains (Losses) Recognized During the Period in Income
Derivatives designated as cash flow hedges
Interest rate	$	—	$	—		$	398	^(a)	$	—		$	—
Total	$	—	$	—		$	398		$	—		$	—
Other derivative instruments
Commodity trading	$	—	$	—		$	—		$	—		$	379		^(b)
Natural gas commodity	—		(5,387		)	—			282		^(c)	(2,990		)	^(c)
Total	$	—	$	(5,387	)	$	—		$	282		$	(2,611	)


^(a)	Amounts are recorded to interest charges.


^(b)	Amounts are recorded to electric operating revenues. Portions of these gains and losses are subject to sharing with electric customers through margin-sharing mechanisms and deducted from gross revenue as appropriate.

^(c)

Certain derivatives are utilized to mitigate natural gas price risk for electric generation and are recorded to electric fuel and purchased power, subject to cost-recovery mechanisms and reclassified to a regulatory asset, as appropriate. Amounts for the three months ended March 31, 2018 and 2017 included $1.2 million of settlement losses and $0.9 million of settlement gains, respectively. The remaining derivative settlement gains and losses for the three months ended March 31, 2018 and 2017 relate to natural gas operations and are recorded to cost of natural gas sold and transported. These gains and losses are subject to cost-recovery mechanisms and reclassified out of income to a regulatory asset or liability, as appropriate.

Derivative Assets and Liabilities Measured at Fair Value on a Recurring Basis by Hierarchy Level

Recurring Fair Value Measurements — The following table presents, for each of the fair value hierarchy levels, PSCo’s assets and liabilities measured at fair value on a recurring basis at March 31, 2018:



	March 31, 2018
	Fair Value						Fair Value Total		Counterparty Netting ^(b)
(Thousands of Dollars)	Level 1		Level 2		Level 3		Fair Value Total		Counterparty Netting ^(b)			Total
Current derivative assets
Other derivative instruments:
Commodity trading	$	587	$	7,965	$	2	$	8,554	$	(5,373	)	$	3,181
Total current derivative assets	$	587	$	7,965	$	2	$	8,554	$	(5,373	)	3,181
PPAs ^(a)												1,716
Current derivative instruments												$	4,897
Noncurrent derivative assets
Other derivative instruments:
Commodity trading	$	—	$	2,298	$	—	$	2,298	$	(1,236	)	$	1,062
Total noncurrent derivative assets	$	—	$	2,298	$	—	$	2,298	$	(1,236	)	1,062
PPAs ^(a)												31
Noncurrent derivative instruments												$	1,093
Current derivative liabilities
Other derivative instruments:
Commodity trading	$	457	$	7,528	$	1	$	7,986	$	(5,372	)	$	2,614
Total current derivative liabilities	$	457	$	7,528	$	1	$	7,986	$	(5,372	)	2,614
PPAs ^(a)												4,730
Current derivative instruments												$	7,344
Noncurrent derivative liabilities
Other derivative instruments:
Commodity trading	$	—	$	2,224	$	—	$	2,224	$	(1,236	)	$	988
Total noncurrent derivative liabilities	$	—	$	2,224	$	—	$	2,224	$	(1,236	)	988
PPAs ^(a)												1,379
Noncurrent derivative instruments												$	2,367


^(a)	During 2006, PSCo qualified these contracts under the normal purchase exception. Based onthis qualification, the contracts are no longer adjusted to fair value and the previous carrying value of these contracts will be amortized over the remaining contract lives along with the offsetting regulatory assets and liabilities.

^(b)

PSCo nets derivative instruments and related collateral in its consolidated balance sheet when supported by a legally enforceable master netting agreement, and all derivative instruments and related collateral amounts were subject to master netting agreements at March 31, 2018. At March 31, 2018, derivative assets and liabilities include no obligations to return cash collateral or rights to reclaim cash collateral. The counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements.

The following table presents, for each of the fair value hierarchy levels, PSCo’s assets and liabilities measured at fair value on a recurring basis at Dec. 31, 2017:



	Dec. 31, 2017
	Fair Value						Fair Value Total		Counterparty Netting ^(b)
(Thousands of Dollars)	Level 1		Level 2		Level 3		Fair Value Total		Counterparty Netting ^(b)			Total
Current derivative assets
Other derivative instruments:
Commodity trading	$	528	$	4,488	$	12	$	5,028	$	(3,554	)	$	1,474
Natural gas commodity	—		18		—		18		(10		)	8
Total current derivative assets	$	528	$	4,506	$	12	$	5,046	$	(3,564	)	1,482
												1,715
Current derivative instruments												$	3,197
Noncurrent derivative assets
Other derivative instruments:
Commodity trading	$	—	$	1,541	$	—	$	1,541	$	(563	)	$	978
Total noncurrent derivative assets	$	—	$	1,541	$	—	$	1,541	$	(563	)	978
PPAs ^(a)												31
Noncurrent derivative instruments												$	1,009
Current derivative liabilities
Other derivative instruments:
Commodity trading	$	446	$	4,285	$	6	$	4,737	$	(3,431	)	$	1,306
Natural gas commodity	—		1,016		—		1,016		(10		)	1,006
Total current derivative liabilities	$	446	$	5,301	$	6	$	5,753	$	(3,441	)	2,312
PPAs ^(a)												5,036
Current derivative instruments												$	7,348
Noncurrent derivative liabilities
Other derivative instruments:
Commodity trading	$	—	$	1,362	$	—	$	1,362	$	(563	)	$	799
Total noncurrent derivative liabilities	$	—	$	1,362	$	—	$	1,362	$	(563	)	799
PPAs ^(a)												$	2,669
Noncurrent derivative instruments												$	3,468


^(a)	During 2006, PSCo qualified these contracts under the normal purchase exception. Based on this qualification, the contracts are no longer adjusted to fair value and the previous carrying value of these contracts will be amortized over the remaining contract lives along with the offsetting regulatory assets and liabilities.

^(b)

PSCo nets derivative instruments and related collateral in its consolidated balance sheet when supported by a legally enforceable master netting agreement, and all derivative instruments and related collateral amounts were subject to master netting agreements at Dec. 31, 2017. At Dec. 31, 2017, derivative assets and liabilities include no obligations to return cash collateral or rights to reclaim cash collateral. The counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements.

Carrying Amount and Fair Value of Long-term Debt

As of March 31, 2018 and Dec. 31, 2017, other financial instruments for which the carrying amount did not equal fair value were as follows:



	March 31, 2018				Dec. 31, 2017
(Thousands of Dollars)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term debt, including current portion	$	4,607,825	$	4,845,116	$	4,608,275	$	5,024,840

(Amounts in Thousands) ^(a)(b)

March 31, 2018

Dec. 31, 2017

Megawatt hours of electricity

Million British thermal units of natural gas