Pension Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 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 June 30
Service cost	$	22		$	19		$	3	$	3
Interest cost	19			22			3		4
Expected return on plan assets	(23		)	(22		)	—		—
Amortization of net actuarial loss (gain)	30			23			—		—
Amortization of net prior service cost (credit)	—			—			—		1
Net periodic benefit cost	$	48		$	42		$	6	$	8
Six Months Ended June 30
Service cost	$	43		$	38		$	5	$	5
Interest cost	39			43			7		8
Expected return on plan assets	(46		)	(45		)	—		—
Amortization of net actuarial loss (gain)	59			46			—		—
Amortization of net prior service cost (credit)	—			—			—		1
Net periodic benefit cost	$	95		$	82		$	12	$	14