Retirement Benefits and Trusteed Assets

6 Months Ended

Jun. 30, 2011

Pension and Other Postretirement Benefit Expense [Abstract]

RETIREMENT BENEFITS AND TRUSTEED ASSETS

RETIREMENT BENEFITS AND TRUSTEED ASSETS

The following details the components of net periodic benefit costs for pension benefits and other postretirement benefits:

	Pension Benefits						Other Postretirement Benefits
(in Millions)	2011			2010			2011			2010
Three Months Ended June 30
Service cost	$	15		$	13		$	13		$	11
Interest cost	38			38			24			24
Expected return on plan assets	(42		)	(43		)	(15		)	(13		)
Amortization of:
Net actuarial loss	24			18			10			9
Prior service cost	1			1			(4		)	—
Net transition liability	—			—			—			1
Special termination benefits	2			—			—			—
Net periodic benefit cost	$	38		$	27		$	28		$	32

	Pension Benefits						Other Postretirement Benefits
(in Millions)	2011			2010			2011			2010
Six Months Ended June 30
Service cost	$	30		$	26		$	26		$	23
Interest cost	77			76			47			48
Expected return on plan assets	(84		)	(86		)	(31		)	(26		)
Amortization of:
Net actuarial loss	47			35			21			19
Prior service cost	2			3			(8		)	1
Net transition liability	—			—			1			1
Special termination benefits	2			—			—			—
Net periodic benefit cost	$	74		$	54		$	56		$	66

Pension and Other Postretirement Contributions

In January 2011, the Company contributed $200 million to its pension plans.

In January 2011, the Company contributed $36 million to its other postretirement benefit plans. At the discretion of management, the Company may make up to an additional $90 million contribution to its other postretirement benefit plans by the end of 2011.