Other Income and Expense - Other Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Other Income and Expenses [Abstract]
Contract termination (Beaver Valley)	$ 0		$ 0		$ 0		$ 60
Contingency reversal (Kazakhstan)	18	[1]	0	[1]	18	[1]	0	[1]
Gain on sale of assets	8		4		10		5
Other	7		9		16		16
Total other income	$ 33		$ 13		$ 44		$ 81

[1] Reversal of a liability in Kazakhstan from the expiration of a statute of limitations for the Republic of Kazakhstan to claim payment from AES.