Retirement Benefits (Tables)

3 Months Ended

Sep. 30, 2011

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income for Pension Benefits

						Three Months Ended				Nine Months Ended
						September 30,				September 30,
						2011		2010		2011		2010
						(In millions)
Components of net periodic benefit cost:
		Service cost				$	2.4	$	2.5	$	7.4	$	7.3
		Interest cost					4.5		4.2		13.6		12.6
		Expected return on plan assets					(5.6)		(5.1)		(16.8)		(15.2)
		Amortization of prior service cost					0.2		0.2		0.5		0.5
		Amortization of net actuarial loss					1.0		1.1		2.9		3.3
			Net periodic benefit cost				2.5		2.9		7.6		8.5
Other changes in plan assets and benefit obligation recognized
	in other comprehensive income:
		Amortization of prior service cost					(0.2)		(0.2)		(0.5)		(0.5)
		Amortization of net actuarial loss					(1.0)		(1.1)		(2.9)		(3.3)
			Total recognized in other comprehensive income				(1.2)		(1.3)		(3.4)		(3.8)
				Total recognized in net periodic benefit cost and other
					comprehensive income	$	1.3	$	1.6	$	4.2	$	4.7

Components of Net Periodic Benefit Cost (Benefit) and Other Amounts Recognized in Other Comprehensive Income for Postretirement Benefits

						Three Months Ended				Nine Months Ended
						September 30,				September 30,
						2011		2010		2011		2010
						(In millions)
Components of net periodic benefit cost:
		Service cost				$	0.4	$	0.3	$	0.8	$	1.0
		Interest cost					0.6		0.6		1.6		1.6
		Expected return on plan assets					(0.2)		(0.2)		(0.6)		(0.6)
		Amortization of prior service credit					(0.1)		(0.1)		(0.2)		(0.2)
		Amortization of net actuarial loss					0.0		0.1		0.0		0.2
			Net periodic benefit cost				0.7		0.7		1.6		2.0
Other changes in plan assets and benefit obligation recognized in
	other comprehensive loss (income):
		Net gain					0.0		0.0		(2.3)		0.0
		Amortization of prior service credit					0.1		0.1		0.2		0.2
		Amortization of net actuarial loss					0.0		(0.1)		0.0		(0.2)
			Total recognized in other comprehensive loss (income)				0.1		0.0		(2.1)		0.0
				Total recognized in net periodic benefit cost
					and other comprehensive loss (income)	$	0.8	$	0.7	$	(0.5)	$	2.0