Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2013

Table Text Block [Abstract]

Supplemental Cash Flow Table

The following summarizes cash paid (received) for interest (net of amounts capitalized) and income taxes, as well as non-cash investing transactions:

	Nine Months Ended   September 30,
millions	2013		2012
Cash paid (received)
Interest	$	569	$	613
Income taxes	$	137	$	(13	)
Non-cash investing activities
Fair value of properties and equipment received in non-cash exchange transactions	$	13	$	65