Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2011

Employee Benefits [Abstract]

Components of net periodic benefit cost

	Three Months Ended June 30,												Six Months Ended June 30,
							Postretirement												Postretirement
	Pension Plans						Welfare Plan						Pension Plans						Welfare Plan
(Dollars in Millions)	2011			2010			2011			2010			2011			2010			2011			2010
Service cost	$	29		$	23		$	1		$	2		$	59		$	46		$	2		$	4
Interest cost		42			39			2			3			84			78			4			5
Expected return on plan assets		(51	)		(53	)		(1	)		(1	)		(103	)		(107	)		(2	)		(2	)
Prior service (credit) cost and transition (asset) obligation amortization		(3	)		(3	)		–			–			(5	)		(6	)		–			–
Actuarial (gain) loss amortization		32			16			(2	)		(2	)		63			32			(3	)		(3	)
Net periodic benefit cost	$	49		$	22		$	–		$	2		$	98		$	43		$	1		$	4