Other (Income) Expense - Net (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2012
Other Income and Expenses [Abstract]
(Gain) Loss on derivatives	$ (62)	$ 0	$ 102	$ 40	$ 0
(Gain) loss on sale of assets and equity dilution	(51)	(17)	(351)	(41)	(30)
Charges from early extinguishment of debt	5	12	0	0	12
Net (gain) loss on marketable securities transactions	(6)	(16)	0	(8)	(37)
Other - net	5	9	2	(44)	26
Total other (income) expense - net	$ (109)	$ (12)	$ (247)	$ (53)	$ (29)