Pension And Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Pension And Other Postretirement Benefit Plans [Abstract]

Components Of Net Periodic Pension Cost

	Quarter Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
(dollars in millions)
Service cost, net of employee contributions	$	6.8		$	6.1		$	20.3		$	18.4
Interest cost		4.8			4.7			14.2			14.2
Expected return on plan assets		(5.9	)		(5.5	)		(17.6	)		(16.5	)
Amortization		1.9			1.8			5.9			5.2
Net periodic pension cost	$	7.6		$	7.1		$	22.8		$	21.3