Pension Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2013

Table Text Block [Abstract]

Components of Net Periodic Benefit Cost Table

The following summarizes the Company’s pension and other postretirement benefit cost:

	Pension Benefits						Other Benefits
millions	2013			2012			2013		2012
Three Months Ended September 30
Service cost	$	21		$	19		$	2	$	2
Interest cost	19			21			3		4
Expected return on plan assets	(22		)	(23		)	—		—
Amortization of net actuarial loss (gain)	29			23			—		—
Amortization of net prior service cost (credit)	—			—			1		—
Net periodic benefit cost	$	47		$	40		$	6	$	6
Nine Months Ended September 30
Service cost	$	64		$	57		$	7	$	7
Interest cost	58			64			10		12
Expected return on plan assets	(68		)	(68		)	—		—
Amortization of net actuarial loss (gain)	88			69			—		—
Amortization of net prior service cost (credit)	—			—			1		1
Net periodic benefit cost	$	142		$	122		$	18	$	20