Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt [Abstract]

Schedule of Total Debt [Table Text Block]

Our total debt at December 31, 2011 and 2010 was comprised of the following (in millions):

Debt, including current maturities:	2011		2010
Tesoro Corporation Revolving Credit Facility	$	—	$	—
Tesoro Panama Company S.A. (“TPSA”) Revolving Credit Facility	117		150
TLLP Revolving Credit Facility	50		—
Junior subordinated notes due 2012 (net of unamortized discount of $16 in 2010)	—		134
6¼% Senior Notes Due 2012	299		450
65/8% Senior Notes Due 2015	450		450
6½% Senior Notes Due 2017	473		500
9¾% Senior Notes Due 2019 (net of unamortized discount of $9 in 2011  and $10 in 2010)	291		290
Capital lease obligations and other	21		21
Total Debt	1,701		1,995
Less current maturities	418		152
Debt, less current maturities	$	1,283	$	1,843

Schedule of Line of Credit Facilities [Table Text Block]

Our credit facilities as of December 31, 2011, were subject to the following expenses and fees.

Credit Facility Rates	30 day Eurodollar (LIBOR)Rate	Eurodollar Margin	Base Rate	Base Rate Margin	Commitment Fee (unused portion)
Tesoro Corporation Revolving Credit Facility ($1.85 billion) (a)	0.30%	1.75%	3.25%	0.75%	0.375%
TPSA Revolving Credit Facility ($500 million) (a)	0.30%	2.75%	3.25%	1.75%	N/A
TLLP Revolving Credit Facility ($150 million) (a)	0.30%	2.50%	3.25%	1.50%	0.50%

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(a) We have the option to elect if the borrowings will bear interest at either a base rate plus the base rate margin, or a Eurodollar rate, for the applicable period, plus, the Eurodollar margin at the time of the borrowing.

Capital Lease Obligations [Table Text Block]

Future minimum annual lease payments, including interest, as of December 31, 2011 for capital leases were (in millions):

2012	$	4
2013	4
2014	4
2015	4
2016	3
Thereafter	11
Total minimum lease payments	30
Less amount representing interest	9
Capital lease obligations	$	21