Condensed Consolidating Financial Information, Balance Sheet (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013		Jun. 30, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 1,239,000,000	$ 1,238,000,000		$ 428,000,000	$ 1,639,000,000
Receivables, less allowance for doubtful accounts	1,815,000,000	1,313,000,000
Inventories	2,642,000,000	2,565,000,000
Prepayments and other current assets	210,000,000	210,000,000
Total Current Assets	5,906,000,000	5,326,000,000
Net Property, Plant and Equipment	6,996,000,000	6,875,000,000
Investment in Subsidiaries	0	0
Long-Term Receivables from Affiliates	0	0
Long-Term Intercompany Note Receivable	0	0
Other Noncurrent Assets, Net	1,169,000,000	1,188,000,000
Total Assets	14,071,000,000	13,389,000,000
Current Liabilities:
Accounts payable	2,998,000,000	2,596,000,000
Other current liabilities	869,000,000	812,000,000
Total Current Liabilities	3,867,000,000	3,408,000,000
Long-Term Payables to Affiliates	0	0
Deferred Income Taxes	1,030,000,000	1,018,000,000
Other Noncurrent Liabilities	586,000,000	655,000,000
Debt	3,055,000,000	2,823,000,000
Long-Term Intercompany Note Payable	0	0
Equity-Tesoro Corporation	4,351,000,000	4,302,000,000
Equity-Noncontrolling Interest	1,182,000,000	1,183,000,000
Total Liabilities and Equity	14,071,000,000	13,389,000,000
Parent
Current Assets
Cash and cash equivalents	0	0		0	0
Receivables, less allowance for doubtful accounts	0	12,000,000
Inventories	0	0
Prepayments and other current assets	87,000,000	109,000,000
Total Current Assets	87,000,000	121,000,000
Net Property, Plant and Equipment	0	0
Investment in Subsidiaries	5,550,000,000	5,242,000,000	[1]
Long-Term Receivables from Affiliates	2,897,000,000	3,080,000,000
Long-Term Intercompany Note Receivable	0	0
Other Noncurrent Assets, Net	52,000,000	58,000,000
Total Assets	8,586,000,000	8,501,000,000
Current Liabilities:
Accounts payable	1,000,000	1,000,000
Other current liabilities	176,000,000	112,000,000
Total Current Liabilities	177,000,000	113,000,000
Long-Term Payables to Affiliates	0	0
Deferred Income Taxes	1,030,000,000	1,018,000,000
Other Noncurrent Liabilities	272,000,000	320,000,000
Debt	1,622,000,000	1,614,000,000
Long-Term Intercompany Note Payable	1,134,000,000	1,134,000,000
Equity-Tesoro Corporation	4,351,000,000	4,302,000,000	[1]
Equity-Noncontrolling Interest	0	0
Total Liabilities and Equity	8,586,000,000	8,501,000,000
Guarantor Subsidiaries
Current Assets
Cash and cash equivalents	940,000,000	1,161,000,000		323,000,000	1,244,000,000
Receivables, less allowance for doubtful accounts	1,309,000,000	1,182,000,000
Inventories	2,323,000,000	2,041,000,000
Prepayments and other current assets	109,000,000	89,000,000
Total Current Assets	4,681,000,000	4,473,000,000
Net Property, Plant and Equipment	5,503,000,000	5,428,000,000
Investment in Subsidiaries	343,000,000	342,000,000	[1]
Long-Term Receivables from Affiliates	0	0
Long-Term Intercompany Note Receivable	0	0
Other Noncurrent Assets, Net	1,080,000,000	1,092,000,000
Total Assets	11,607,000,000	11,335,000,000
Current Liabilities:
Accounts payable	2,293,000,000	2,110,000,000
Other current liabilities	626,000,000	679,000,000
Total Current Liabilities	2,919,000,000	2,789,000,000
Long-Term Payables to Affiliates	2,810,000,000	2,939,000,000
Deferred Income Taxes	0	0
Other Noncurrent Liabilities	299,000,000	327,000,000
Debt	42,000,000	45,000,000
Long-Term Intercompany Note Payable	0	0
Equity-Tesoro Corporation	5,537,000,000	5,235,000,000	[1]
Equity-Noncontrolling Interest	0	0
Total Liabilities and Equity	11,607,000,000	11,335,000,000
Non- Guarantors
Current Assets
Cash and cash equivalents	299,000,000	77,000,000		105,000,000	395,000,000
Receivables, less allowance for doubtful accounts	506,000,000	119,000,000
Inventories	319,000,000	524,000,000
Prepayments and other current assets	18,000,000	57,000,000
Total Current Assets	1,142,000,000	777,000,000
Net Property, Plant and Equipment	1,493,000,000	1,447,000,000
Investment in Subsidiaries	0	0	[1]
Long-Term Receivables from Affiliates	0	0
Long-Term Intercompany Note Receivable	1,134,000,000	1,134,000,000
Other Noncurrent Assets, Net	37,000,000	38,000,000
Total Assets	3,806,000,000	3,396,000,000
Current Liabilities:
Accounts payable	704,000,000	485,000,000
Other current liabilities	71,000,000	66,000,000
Total Current Liabilities	775,000,000	551,000,000
Long-Term Payables to Affiliates	87,000,000	141,000,000
Deferred Income Taxes	0	0
Other Noncurrent Liabilities	15,000,000	8,000,000
Debt	1,391,000,000	1,164,000,000
Long-Term Intercompany Note Payable	0	0
Equity-Tesoro Corporation	356,000,000	349,000,000	[1]
Equity-Noncontrolling Interest	1,182,000,000	1,183,000,000
Total Liabilities and Equity	3,806,000,000	3,396,000,000
Eliminations
Current Assets
Cash and cash equivalents	0	0		0	0
Receivables, less allowance for doubtful accounts	0	0
Inventories	0	0
Prepayments and other current assets	(4,000,000)	(45,000,000)
Total Current Assets	(4,000,000)	(45,000,000)
Net Property, Plant and Equipment	0	0
Investment in Subsidiaries	(5,893,000,000)	(5,584,000,000)	[1]
Long-Term Receivables from Affiliates	(2,897,000,000)	(3,080,000,000)
Long-Term Intercompany Note Receivable	(1,134,000,000)	(1,134,000,000)
Other Noncurrent Assets, Net	0	0
Total Assets	(9,928,000,000)	(9,843,000,000)
Current Liabilities:
Accounts payable	0	0
Other current liabilities	(4,000,000)	(45,000,000)
Total Current Liabilities	(4,000,000)	(45,000,000)
Long-Term Payables to Affiliates	(2,897,000,000)	(3,080,000,000)
Deferred Income Taxes	0	0
Other Noncurrent Liabilities	0	0
Debt	0	0
Long-Term Intercompany Note Payable	(1,134,000,000)	(1,134,000,000)
Equity-Tesoro Corporation	(5,893,000,000)	(5,584,000,000)	[1]
Equity-Noncontrolling Interest	0	0
Total Liabilities and Equity	$ (9,928,000,000)	$ (9,843,000,000)

[1] Revised to conform to current period presentation that reflects investment in subsidiary and equity amounts within the guarantor and non-guarantor columns net of intercompany amounts.