CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Cash and cash equivalents ($264 and $290 related to VIEs, respectively)	$ 264	$ 290
Allowance for Doubtful Accounts Receivable, Current	1	3
Accounts and notes receivable, net ($64 and $58 related to VIEs, respectively), less bad debt reserve of $1 and $3, respectively	234	237
Other ($35 and $47 related to VIEs, respectively)	63	74
Regulatory assets ($2,373 and $2,738 related to VIEs, respectively)	2,211	2,629
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents ($264 and $290 related to VIEs, respectively)	264	290
Accounts and notes receivable, net ($64 and $58 related to VIEs, respectively), less bad debt reserve of $1 and $3, respectively	64	58
Other ($35 and $47 related to VIEs, respectively)	35	47
Regulatory assets ($2,373 and $2,738 related to VIEs, respectively)	$ 2,373	$ 2,738