Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2011

Components of qualified and nonqualified pension expense, and postretirement benefits expense, included in net income

Components of the qualified and nonqualified pension expense included in the determination of net income are listed in the table below. The 2010 amounts have not been recast for the Spinoff of QEP.

	3 Months Ended June 30,						6 Months Ended June 30,						12 Months Ended June 30,
	2011			2010			2011			2010			2011			2010
	(in millions)
Service cost	$	2.2		$	2.5		$	4.4		$	4.9		$	8.8		$	9.8
Interest cost		7.1			7.9			14.2			15.8			27.1			31.1
Expected return on plan assets		(6.3	)		(6.4	)		(12.6	)		(12.8	)		(24.2	)		(25.4	)
Prior service and other costs		0.3			0.3			0.6			0.6			1.1			1.2
Recognized net-actuarial loss		2.6			1.7			5.2			3.5			9.9			7.2
Curtailment costs		-			0.1			-			0.3			2.1			(0.3	)
Special-termination benefits		-			-			-			-			-			2.0
Pension expense	$	5.9		$	6.1		$	11.8		$	12.3		$	24.8		$	25.6

The Company currently estimates a $4.8 million expense for postretirement benefits other than pensions in 2011 before $0.8 million for accretion of a regulatory liability. Postretirement benefit expense components are listed in the table below. The 2010 amounts have not been recast for the Spinoff of QEP.

	3 Months Ended June 30,						6 Months Ended June 30,						12 Months Ended June 30,
	2011			2010			2011			2010			2011			2010
	(in millions)
Service cost	$	0.1		$	0.1		$	0.3		$	0.3		$	0.6		$	0.6
Interest cost		1.1			1.2			2.2			2.4			4.2			4.6
Expected return on plan assets		(0.6	)		(0.6	)		(1.3	)		(1.1	)		(2.6	)		(2.2	)
Amortization of transition obligation		0.4			0.4			0.9			0.9			1.9			1.9
Amortization of losses		0.2			0.2			0.3			0.4			0.5			0.8
Curtailment costs		-			-			-			-			0.3			-
Accretion of regulatory liability		0.2			0.2			0.4			0.4			0.8			0.8
Postretirement benefits expense	$	1.4		$	1.5		$	2.8		$	3.3		$	5.7		$	6.5