CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Cash and cash equivalents ($340 and $264 related to VIEs, respectively)	$ 341	$ 264
Allowance for Doubtful Accounts Receivable, Current	1	1
Accounts and notes receivable, net ($52 and $64 related to VIEs, respectively), less bad debt reserve of $1 and $1, respectively	225	234
Other ($40 and $35 related to VIEs, respectively)	66	63
Regulatory assets ($1,919 and $2,373 related to VIEs, respectively)	1,793	2,211
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents ($340 and $264 related to VIEs, respectively)	340	264
Accounts and notes receivable, net ($52 and $64 related to VIEs, respectively), less bad debt reserve of $1 and $1, respectively	52	64
Other ($40 and $35 related to VIEs, respectively)	40	35
Regulatory assets ($1,919 and $2,373 related to VIEs, respectively)	$ 1,919	$ 2,373