Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Pension Benefits [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Pension And Postretirement Cost

	Nine Months Ended September 30,
Pension benefits	2012			2011
Service cost	$	12.9		$	11.8
Interest cost	29.3			30.2
Expected return on plan assets	(26.7		)	(27.2		)
Amortization of net actuarial loss and prior service cost	7.9			5.3
Net annual pension cost	$	23.4		$	20.1

	Three Months Ended September 30,
Pension benefits	2012			2011
Service cost	$	4.3		$	3.9
Interest cost	9.8			10.0
Expected return on plan assets	(8.9		)	(9.0		)
Amortization of net actuarial loss and prior service cost	2.6			1.8
Net annual pension cost	$	7.8		$	6.7

Postretirement Benefits [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Pension And Postretirement Cost

	Nine Months Ended September 30,
Postretirement benefits	2012			2011
Service cost	$	0.1		$	0.1
Interest cost	1.2			1.2
Amortization of prior service credit	(0.2		)	(0.2		)
Amortization of net actuarial loss	0.3			0.2
Net annual postretirement benefit cost	$	1.4		$	1.3

	Three Months Ended September 30,
Postretirement benefits	2012			2011
Interest cost	$	0.4		$	0.4
Amortization of prior service credit	(0.1		)	(0.1		)
Amortization of net actuarial loss	0.1			0.1
Net annual postretirement benefit cost	$	0.4		$	0.4