Retirement and Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2013

Retirement and Postretirement Benefit Plans

Components of the net periodic benefit cost (in millions)

Three months ended June 30	2013					2012
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit		Pension Benefit			Postretirement Benefit
Service cost	$	3		$	7	$	3		$	6
Interest cost		7			10		7			11
Expected return on plan assets		(8	)		—		(8	)		—
Recognized actuarial loss		4			10		5			9
Total	$	6		$	27	$	7		$	26

Six months ended June 30	2013					2012
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit		Pension Benefit			Postretirement Benefit
Service cost	$	7		$	14	$	6		$	13
Interest cost		13			21		14			22
Expected return on plan assets		(16	)		—		(16	)		—
Recognized actuarial loss		8			20		10			17
Total	$	12		$	55	$	14		$	52