Pension and Other Postretirement Benefit Plans

3 Months Ended

Mar. 31, 2012

Pension and Other Postretirement Benefit Plans [Abstract]

Pension and Other Postretirement Benefit Plans [Text Block]

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS

	Pension				Other Postretirement
Components of Net Periodic Benefit Expense	2012		2011		2012		2011
Millions
For the Quarter Ended March 31,
Service Cost	$2.3		$1.9		$1.0		$1.0
Interest Cost	6.6		6.9		2.4		2.7
Expected Return on Plan Assets	(8.8	)	(8.7	)	(2.5	)	(2.4	)
Amortization of Prior Service Costs	0.1		0.1		(0.4	)	(0.4	)
Amortization of Net Loss	4.3		3.0		1.9		2.1
Net Periodic Benefit Expense	$4.5		$3.2		$2.4		$3.0

Employer Contributions. For the quarter ended March 31, 2012, no contributions were made to our defined benefit pension plan (no contributions for the quarter ended March 31, 2011). For the quarter ended March 31, 2012, no contributions were made to our other postretirement benefit plan ($10.9 million for the quarter ended March 31, 2011). We expect to contribute $1.0 million to our defined benefit pension plan in 2012, and we expect to contribute $13.9 million to our other postretirement benefit plan in 2012.

Accounting and disclosure requirements for the Medicare Prescription Drug, Improvement and Modernization Act of 2003 (Act) provides guidance for employers that sponsor postretirement health care plans that provide prescription drug benefits. We provide postretirement health benefits that include prescription drug benefits, which qualify for the federal subsidy under the Act. For the quarter ended March 31, 2012, we received $0.3 million in prescription drug reimbursements.