Fair Value (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis



Recurring Fair Value Measurements December 31, 2014 (in millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of December 31, 2014
Assets
Price risk management assets:
Commodity financial price risk programs	$	0.1	$	—	$	—	$	0.1
Available-for-sale securities	28.4		103.5		—		131.9
Total	$	28.5	$	103.5	$	—	$	132.0
Liabilities
Price risk management liabilities:
Commodity financial price risk programs	$	14.2	$	—	$	0.1	$	14.3
Total	$	14.2	$	—	$	0.1	$	14.3



Recurring Fair Value Measurements December 31, 2013 (in millions)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of December 31, 2013
Assets
Price risk management assets:
Commodity financial price risk programs	2.1		—		—		2.1
Interest rate risk activities	—		21.1		—		21.1
Available-for-sale securities	25.3		96.1		—		121.4
Total	$	27.4	$	117.2	$	—	$	144.6
Liabilities
Price risk management liabilities:
Commodity financial price risk programs	$	1.6	$	—	$	0.1	$	1.7
Total	$	1.6	$	—	$	0.1	$	1.7

Available-For-Sale Debt Securities



December 31, 2014 (in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale debt securities
U.S. Treasury securities	$	30.8	$	0.3	$	(0.2	)	$	30.9
Corporate/Other bonds	100.6		1.0		(0.6		)	101.0
Total	$	131.4	$	1.3	$	(0.8	)	$	131.9
December 31, 2013 (in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale debt securities
U.S. Treasury securities	$	30.3	$	0.3	$	(0.5	)	$	30.1
Corporate/Other bonds	91.5		1.1		(1.3		)	91.3
Total	$	121.8	$	1.4	$	(1.8	)	$	121.4

Carrying Amount And Estimated Fair Values Of Financial Instruments



At December 31, (in millions)	Carrying Amount 2014		Estimated Fair Value 2014		Carrying Amount 2013		Estimated Fair Value 2013
Long-term debt (including current portion)	$	8,422.5	$	9,505.7	$	8,135.3	$	8,697.3

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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