Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2011

Employee Benefits [Abstract]

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

	Three Months						Six Months
	2011			2010			2011			2010
Retirement Plans
Service cost	$	15.9		$	14.4		$	33.5		$	30.6
Interest cost		24.7			23.2			49.6			46.9
Expected return on plan assets		(31.9	)		(27.8	)		(63.7	)		(55.7	)
Amortization of prior service credit		(0.1	)		—			(0.2	)		(0.1	)
Amortization of actuarial loss		8.0			3.6			15.3			7.4
Net periodic benefit cost	$	16.6		$	13.4		$	34.5		$	29.1
Post-Retirement Plans
Service cost	$	0.7		$	0.6		$	1.4		$	1.2
Interest cost		1.7			1.7			3.4			3.7
Amortization of prior service credit		(0.3	)		(0.3	)		(0.6	)		(0.6	)
Amortization of actuarial (gain) loss		—			(0.1	)		0.1			—
Net periodic benefit cost	$	2.1		$	1.9		$	4.3		$	4.3