Pension and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2011

Pension and Other Postretirement Benefit Plans

Components of Net Periodic Pension Cost

	Quarter Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
(dollars in millions)
Service cost, net of employee contributions	$	6.8		$	6.1		$	13.5		$	12.3
Interest cost		4.7			4.8			9.4			9.5
Expected return on plan assets		(5.9	)		(5.5	)		(11.7	)		(11.0	)
Amortization		2.0			1.7			4.0			3.4
Net periodic pension cost	$	7.6		$	7.1		$	15.2		$	14.2