Other (Income) Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Income and Expenses [Abstract]
Gain on sale of assets	$ (16)	$ 0	$ (21)	$ (9)
Net gain on marketable securities transactions	(5)	(1)	(5)	(9)
Loss on Australian foreign exchange hedges	51	0	51	0
Other - net	(8)	18	0	13
Other (Income) Expense - Net	$ 22	$ 17	$ 25	$ (5)