Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2014

Retirement Plans [Abstract]

Net Periodic Pension And OPEB Cost [Table Text Block]

The components of our net periodic pension costwere as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Millions	2014		2013		2014		2013
Service cost	$	17	$	18	$	35	$	37
Interest cost		38		33		77		66
Expected return on plan assets		(57)		(50)		(115)		(101)
Amortization of:
Actuarial loss		18		27		35		53
Net periodic pension cost	$	16	$	28	$	32	$	55

The components of our net periodic OPEB cost were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Millions	2014		2013		2014		2013
Service cost	$	1	$	1	$	2	$	2
Interest cost		3		3		7		6
Amortization of:
Prior service credit		(3)		(4)		(6)		(8)
Actuarial loss		3		3		5		7
Net periodic OPEB cost	$	4	$	3	$	8	$	7