Pension and Other Postretirement Benefit Plans

3 Months Ended

Mar. 31, 2013

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	2013			2012			2013			2012
Millions
For the Quarter Ended March 31,
Service Cost		$2.5			$2.3			$1.0			$1.0
Interest Cost	6.5			6.6			1.7			2.4
Expected Return on Plan Assets	(8.8		)	(8.8		)	(2.5		)	(2.5		)
Amortization of Prior Service Costs	0.1			0.1			(0.6		)	(0.4		)
Amortization of Net Loss	5.3			4.3			0.4			1.9
Net Periodic Benefit Expense		$5.6			$4.5		—				$2.4

Employer Contributions. For the quarter ended March 31, 2013, no contributions were made to our defined benefit pension plan (none for the quarter ended March 31, 2012). For the quarter ended March 31, 2013, we contributed $10.8 million to our other postretirement benefit plan (none for the quarter ended March 31, 2012). We do not expect to contribute to our defined benefit pension plan in 2013, and we do not expect to make any additional contributions to our other postretirement benefit plan in 2013.