Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2011

Employee Benefits [Abstract]

Components Of Estimated Pension And Postretirement Benefits Expense

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Pension expense
Service cost	$	21.3		$	20.1		$	64.1		$	60.3
Interest cost		48.4			46.2			145.4			138.1
Expected return on assets		(67.2	)		(64.8	)		(201.6	)		(193.7	)
Amortization, net		12.4			6.5			37.4			19.2
Net pension expense	$	14.9		$	8.0		$	45.3		$	23.9
Postretirement benefits expense
Service cost	$	1.8		$	3.1		$	6.4		$	9.2
Interest cost		5.2			7.1			17.6			21.3
Expected return on assets		(3.6	)		(3.8	)		(11.2	)		(11.6	)
Amortization, net		(5.0	)		(2.5	)		(7.5	)		(7.2	)
Net postretirement benefits expense	$	(1.6	)	$	3.9		$	5.3		$	11.7