Condensed Consolidated Statements of Financial Position (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011		Mar. 31, 2011
Current assets
Cash and cash equivalents	$ 71		$ 69		$ 85
Short-term investments	57		53		0
Receivables
Energy marketing receivables	386		607		565
Gas, unbilled and other receivables	577		692		367
Less allowance for uncollectible accounts	19		15		21
Total receivables	944		1,284		911
Inventories, net	464		750		361
Derivative instruments – current portion	218		226		111
Regulatory assets – current portion	137		131	[1]	73
Other current assets	131		233		46
Total current assets	2,022		2,746		1,587
Long-term assets and other deferred debits
Property, plant and equipment	9,920		9,779		6,348
Less accumulated depreciation	1,947		1,879		1,830
Property, plant and equipment, net	7,973		7,900		4,518
Goodwill	1,813		1,813		418
Regulatory assets – noncurrent portion	1,057		1,079	[1]	434
Derivative instruments – noncurrent portion	48		62		29
Other	326		313		40
Total long-term assets and other deferred debits	11,217		11,167		5,439
Total assets	13,239	[2]	13,913	[3]	7,026	[2]
Current liabilities
Energy marketing trade payables	425		590		628
Accounts payable – trade	205		294		154
Regulatory liabilities – current portion	173		112	[1]	77
Accrued expenses	145		162		141
Accrued regulatory infrastructure program costs – current portion	149		131		69
Short-term debt	730		1,321		25
Derivative instruments – current portion	93		99		25
Accrued environmental remediation liabilities – current portion	39		37		15
Other current liabilities	389		338		179
Total current liabilities	2,348		3,084		1,313
Long-term liabilities and other deferred credits
Long-term debt	3,558		3,561		2,173
Accumulated deferred income taxes	1,447		1,445		803
Regulatory liabilities – noncurrent portion	1,431		1,405	[1]	296
Accrued pension obligations	228		238		153
Accrued regulatory infrastructure program costs	110		145		143
Accrued environmental remediation liabilities	289		290		126
Accrued other retirement benefit costs	318		320		34
Derivative instruments – noncurrent portion	10		11		3
Other long-term liabilities and other deferred credits	74		75		62
Total long-term liabilities and other deferred credits	7,465		7,490		3,793
Total liabilities and other deferred credits	9,813		10,574		5,106
Equity
AGL Resources Inc. common shareholders’ equity, $5 par value; 750,000,000 shares authorized	3,410		3,318		1,903
Noncontrolling interest	16		21		17
Total equity	3,426		3,339		1,920
Total liabilities and equity	$ 13,239		$ 13,913		$ 7,026

[1] The increase in regulatory assets and liabilities from March 31, 2011, includes $545 million related to the addition of Nicor Gas' regulatory assets and includes $1,330 million related to the addition of Nicor Gas' regulatory liabilities.

[2] Identifiable assets are those used in each segment's operations.

[3] Identifiable assets are those assets used in each segment's operations.