Fair Value Measurements and Derivatives Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis Table (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

The table below identifies the Partnership's assets and liabilities that were recorded at fair value at September 30, 2012 (in millions):

			Fair Value Measurements at September 30, 2012
	September 30, 2012		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total Gains (losses) for the three months ended September 30, 2012			Total Gains (losses) for the nine months ended September 30, 2012
Recurring fair value measurements - Assets
Derivatives
Commodity contracts	$	—	$	—	$	—	$	—
Recurring fair value measurements - Liabilities
Derivatives
Commodity contracts	$	0.8	$	—	$	0.8	$	—
Nonrecurring fair value measurements - Assets
Assets to be abandoned (1)	$	—	$	—	$	—	$	—	$	(1.1	)	$	(3.2	)
Assets held for sale (2)	—		—		—		—		—			(2.8		)
	$	—	$	—	$	—	$	—	$	(1.1	)	$	(6.0	)
Nonrecurring fair value measurements - Liabilities
Asset retirement obligation (1)	$	2.2	$	—	$	—	$	2.2	$	—		$	(2.2	)

(1) In the first half of 2012, the Partnership determined that it would retire a number of small-diameter pipeline assets with a carrying value of $2.1 million. As a result, an asset impairment charge of $4.3 million was recorded for the nine months ended September 30, 2012, of which $2.2 million represent amounts related to the asset retirement obligations for these assets. Additionally, in the third quarter 2012, the Partnership determined that it would retire a turbine associated with one of its compressor stations, which had a carrying value of $1.1 million. As a result, an asset impairment charge of $1.1 million was recorded for the three and nine months ended September 30, 2012.

(2) In the first quarter 2012, the Partnership recognized a $2.8 million impairment charge related to its Owensboro, Kentucky, office building. The office building was subsequently sold for an amount that equaled its carrying value in the third quarter 2012.