Pension and Postretirement Benefits (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2011

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of net periodic benefit costs for pension and postretirement benefits

The components of net periodic benefit costs for pension and postretirement benefits follow (in millions):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Service cost	$	10		$	8		$	20		$	18
Interest cost	27			26			54			53
Expected return on plan assets	(24		)	(24		)	(48		)	(47		)
Amortization of net actuarial loss	6			6			12			11
Net periodic benefit costs	$	19		$	16		$	38		$	35