CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 69	$ 24
Short Term Investments	53	0
Receivables
Energy Marketing Receivables	607	788
Gas	364	204
Unbilled revenues	216	173
Other	112	13
Less allowance for uncollectible accounts	15	16
Total receivables	1,284	1,162
Inventories, net
Inventories - Natural gas stored underground	702	607
Inventories - Other	48	32
Total Inventories (Note 2)	750	639
Derivative financial instruments - current portion (Note 2, Note 4 and Note 5)	248	182
Recoverable regulatory infrastructure program costs - current portion (Note 2)	48	48
Recoverable environmental remediation costs - current portion (Note 2 and Note 9)	7	7
Recoverable postretirement benefits - current	29	0
Prepaid Expense Current	164	66
Other current assets	94	38
Total current assets	2,746	2,166
Long-term assets and other deferred debits
Property, plant and equipment	9,779	6,266
Less accumulated depreciation	1,879	1,861
Property, plant and equipment-net	7,900	4,405
Goodwill	1,813	418
Intangible assets	105	3
Recoverable regulatory infrastructure program costs (Note 2)	305	244
Recoverable environmental remediation costs (Note 2)	351	164
Non Current Regulatory Asset Postretirement Benefit	262
Long Term Investments	128	11
Derivative financial instruments (Note 2, Note 4 and Note 5)	66	46
Other	237	63
Total long-term assets and other deferred debits	11,167	5,354
Total assets	13,913	7,520
Current liabilities
Energy marketing trade payable (Note 2)	590	744
Short-term debt (Note 4 and Note 7)	1,323	733
Current portion of long-term debt	15	300
Accounts payable - trade	294	178
Accrued regulatory infrastructure program costs - current portion (Note 2)	131	62
Customer deposits	152	52
Accrued wages and salaries	52	51
Accrued taxes	49	48
Derivative financial instruments - current portion (Note 2, Note 4 and Note 5)	99	44
Accrued Interest	61	40
Deferred natural gas costs (Note 1)	53	23
Accrued environmental remediation liabilities - current portion (Note 2 and Note 9)	37	14
Other current liabilities	228	143
Total current liabilities	3,084	2,432
Long-term liabilities and other deferred credits
Long-term debt (Note 4 and Note 7)	3,561	1,671
Accumulated deferred income taxes	1,445	768
Accrued pension obligations (Note 6)	238	186
Accumulated removal costs	1,321	182
Accrued regulatory infrastructure program costs (Note 2)	145	166
Accrued environmental remediation liabilities (Note 2 and Note 9)	290	129
Accrued postretirement benefit costs (Note 6)	320	36
Derivative financial instruments (Note 2, Note 4 and Note 5)	11	4
Other long-term liabilities and other deferred credits	159	110
Total long-term liabilities and other deferred credits	7,490	3,252
Total liabilities and other deferred credits	10,574	5,684
Equity
Common stock, $5 par value; 750 million shares authorized	586	391
Additional Paid in Capital	1,989	631
Retained Earnings	967	943
Treasury Stock, Value	(7)	(2)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(217)	(150)
Total common shareholders' equity Stockholders Equity	3,318	1,813
Noncontrolling interest (Note 8)	21	23
Total equity	3,339	1,836
Total liabilities and equity	$ 13,913	$ 7,520