Employee Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2013

Compensation And Retirement Disclosure [Abstract]

Schedule of Net Periodic Benefit Cost

Included in the table below is the periodic expense for pension and other postretirement benefits offered by the company.

Pension Expense
(millions)	Pension Benefits						Other Postretirement Benefits
Three months ended Sept. 30,	2013			2012			2013			2012
Components of net periodic benefit expense
Service cost	$	4.5		$	4.3		$	0.7		$	0.6
Interest cost on projected benefit obligations		7.3			7.5			2.3			2.5
Expected return on assets		(9.6	)		(9.3	)		0.0			0.0
Amortization of:
Transition obligation		0.0			0.0			0.0			0.4
Prior service (benefit) cost		(0.1	)		(0.1	)		(0.1	)		0.2
Actuarial loss		5.1			3.9			0.2			0.1
Settlement cost		1.0			0.0			0.0			0.0
Net pension expense recognized in the Consolidated Condensed Statements of Income	$	8.2		$	6.3		$	3.1		$	3.8
Nine months ended Sept. 30,
Components of net periodic benefit expense
Service cost	$	13.6		$	12.8		$	1.9		$	1.8
Interest cost on projected benefit obligations		21.7			22.5			7.0			7.6
Expected return on assets		(28.8	)		(27.8	)		0.0			0.0
Amortization of:
Transition obligation		0.0			0.0			0.0			1.3
Prior service (benefit) cost		(0.3	)		(0.3	)		(0.3	)		0.6
Actuarial loss		15.4			11.5			0.7			0.1
Settlement cost		1.0			0.0			0.0			0.0
Net pension expense recognized in the Consolidated Condensed Statements of Income	$	22.6		$	18.7		$	9.3		$	11.4