Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2011

Employee Benefits [Abstract]

Components of net periodic cost for defined benefit plans and post-retirement healthcare and other benefits plan

	Three Months						Nine Months
	2011			2010			2011			2010
Retirement Plans
Service cost	$	16.7		$	15.2		$	50.2		$	45.8
Interest cost		24.9			23.5			74.5			70.4
Expected return on plan assets		(31.8	)		(27.9	)		(95.5	)		(83.6	)
Amortization of prior service credit		(0.1	)		—			(0.3	)		(0.1	)
Amortization of actuarial loss		7.7			3.7			23.0			11.1
Net periodic benefit cost	$	17.4		$	14.5		$	51.9		$	43.6
Post-Retirement Plans
Service cost	$	0.6		$	0.7		$	2.0		$	1.9
Interest cost		1.2			1.8			4.6			5.5
Amortization of prior service credit		(0.3	)		(0.3	)		(0.9	)		(0.9	)
Amortization of actuarial gain		(0.1	)		—			—			—
Net periodic benefit cost	$	1.4		$	2.2		$	5.7		$	6.5