CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 112.7	$ 76.3
Trade receivables, net of allowances $0.9 million and $0.9 million	427.6	514.9
Inventories	66.0	99.4
Assets from risk management activities	18.2	29.3
Other current assets	6.7	13.4
Total current assets	631.2	733.3
Property, plant and equipment	4,919.6	4,708.0
Accumulated depreciation	(1,227.2)	(1,170.0)
Property, plant and equipment, net	3,692.4	3,538.0
Other intangible assets, net	674.1	680.8
Long-term assets from risk management activities	3.2	5.1
Investment in unconsolidated affiliate	54.8	53.1
Other long-term assets	92.8	94.7
Total assets	5,148.5	5,105.0
Current liabilities:
Accounts payable and accrued liabilities	621.1	679.0
Deferred income taxes	3.8	0.2
Liabilities from risk management activities	8.2	7.4
Total current liabilities	633.1	686.6
Long-term debt	2,522.4	2,475.3
Long-term liabilities from risk management activities	5.0	4.8
Deferred income taxes	127.2	131.2
Other long-term liabilities	57.6	53.7
Commitments and contingencies (see Note 14)
Targa Resources Corp. stockholders' equity:
Common stock ($0.001 par value, 300,000,000 shares authorized, 42,528,118 shares issued and 42,330,387 shares outstanding as of March 31, 2013, and 42,492,233 shares issued and 42,294,502 shares outstanding as of December 31, 2012)	0	0
Preferred stock ($0.001 par value, 100,000,000 shares authorized, no shares issued and outstanding as of March 31, 2013 and December 31, 2012)	0	0
Additional paid-in capital	173.4	184.4
Accumulated deficit	(18.6)	(32.0)
Accumulated other comprehensive income	0.1	1.2
Treasury stock, at cost (197,731 shares as of March 31, 2013 and as of December 31, 2012)	(9.5)	(9.5)
Total Targa Resources Corp. stockholders' equity	145.4	144.1
Noncontrolling interests in subsidiaries	1,657.8	1,609.3
Total owners' equity	1,803.2	1,753.4
Total liabilities and owners' equity	$ 5,148.5	$ 5,105.0