Retirement and Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2011

Components of Net Periodic Pension Cost

The following table summarizes the components of net periodic pension cost:

	For the three months ended June 30,						For the six months ended June 30,
($ in millions)	2011			2010			2011			2010
Service cost	$	—			—			—			—
Interest cost		3			3			6			6
Expected return on assets		(4	)		(3	)		(8	)		(6	)
Amortization of actuarial loss		3			3			6			6
Amortization of net prior service cost		—			—			—			—
Settlement		—			—			—			—
Net periodic pension cost	$	2			3			4			6