Retirement Benefits (Tables)

3 Months Ended

Sep. 30, 2011

Pension Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Defined Benefit Pension Plans
	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011		2010
	(Dollars in millions)
Components of net periodic benefit cost
Service cost		$  57.7		$	54.7	$	174.7	$	165.5
Interest cost		111.8			107.9		335.8		323.7
Expected return on plan assets		(171.9	)		(158.8)		(515.2)		(476.4)
Amortization of prior service cost		2.2			1.7		6.9		5.0
Recognized actuarial loss		50.4			41.2		149.2		123.5
Net periodic benefit cost		$  50.2		$	46.7	$	151.4	$	141.3

Other Postretirement Benefit Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Retiree Health Benefit Plans
	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011		2010
	(Dollars in millions)
Components of net periodic benefit cost
Service cost		$  14.4		$	14.1	$	43.1	$	42.2
Interest cost		29.5			30.3		88.6		90.2
Expected return on plan assets		(31.9	)		(30.6)		(95.7)		(92.0)
Amortization of prior service cost		(10.7	)		(9.3)		(32.2)		(27.9)
Recognized actuarial loss		22.2			21.3		66.5		63.8
Net periodic benefit cost		$  23.5		$	25.8	$	70.3	$	76.3