Balance Sheet Parenthetical - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Cash and Cash Equivalents	$ 270	$ 264
Bad debt reserve	1	1
Accounts and notes receivable, net	354	234
Other	62	63
Regulatory assets	1,870	2,211
Variable Interest Entity, Primary Beneficiary [Member]
Cash and Cash Equivalents	269	264
Accounts and notes receivable, net	97	64
Other	38	35
Regulatory assets	$ 1,999	$ 2,373