Pension and Other Postretirement Benefit Plans

9 Months Ended

Sep. 30, 2015

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 (Income)	2015			2014			2015		2014
Millions
Quarter Ended September 30,
Service Cost	$2.6				$2.0		$1.0			$0.9
Interest Cost	7.5			7.5			1.8		1.8
Expected Return on Plan Assets	(10.2		)	(9.6		)	(2.7	)	(2.5		)
Amortization of Prior Service Costs (Credits)	—			0.1			(0.7	)	(0.7		)
Amortization of Net Loss	4.4			3.6			0.1		0.1
Net Periodic Benefit Expense (Income)		$4.3			$3.6		$(0.5)		$(0.4)

Nine Months Ended September 30,
Service Cost	$7.6				$6.2		$3.2			$2.6
Interest Cost	22.4			22.4			5.4		5.5
Expected Return on Plan Assets	(30.5		)	(28.7		)	(8.2	)	(7.7		)
Amortization of Prior Service Costs (Credits)	0.1			0.2			(2.2	)	(1.9		)
Amortization of Net Loss	13.4			10.7			0.3		0.3
Net Periodic Benefit Expense (Income)		$13.0			$10.8		$(1.5)		$(1.2)

Employer Contributions. For the nine months ended September 30, 2015, no contributions were made to our defined benefit pension plan ($19.5 million for the nine months ended September 30, 2014); we do not expect to make any contributions to our defined benefit pension plan in 2015. For the nine months ended September 30, 2015 and 2014, we made no contributions to our other postretirement benefit plan; we do not expect to make any contributions to our other postretirement benefit plan in 2015.