Tesoro Logistics LP Tesoro Logistics LP, QEPFS Acquisition (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended	9 Months Ended		0 Months Ended				0 Months Ended		0 Months Ended							0 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Oct. 29, 2014 Subsequent Event	Oct. 24, 2014 Subsequent Event	Oct. 19, 2014 Subsequent Event	Oct. 29, 2014 Subsequent Event	Oct. 19, 2014 QEP Midstream Partners LP Subsequent Event	Oct. 19, 2014 QEP Midstream Partners LP Subsequent Event	Aug. 22, 2014 Limited Partner	Oct. 24, 2014 Limited Partner Subsequent Event	Oct. 24, 2014 Over-allotment Option Subsequent Event	Oct. 24, 2014 Affiliated Entity Subsequent Event	Oct. 24, 2014 TLGP Subsequent Event	Oct. 29, 2014 5.5% Senior Notes due 2019 Subsequent Event	Oct. 29, 2014 5.5% Senior Notes due 2019 Subsequent Event	Oct. 29, 2014 6.25% Senior Notes Due 2022 Subsequent Event	Oct. 29, 2014 6.25% Senior Notes Due 2022 Subsequent Event
Subsequent Event
Purchase agreement date						Oct. 19, 2014
Limited Partner, Ownership Interest								56.00%
General Partner, Ownership Interest								2.00%						2.00%
Incentive distribution rights, percentage								100.00%
Purchase price								$ 2,500,000,000
Debt to be refinanced after acquisition									230,000,000
Break-up fee								150,000,000
Public offering, common units										2.1	23.0
Additional common units purchased												3
Net proceeds from the issuance of TLLP Common units		156,000,000	392,000,000		1,300,000,000					142,000,000			500,000,000
Proceeds from Issuance or Sale of Equity	14,000,000													27,000,000
Debt Instrument, Offering Date				Oct. 29, 2014
Debt instrument, aggregate principal							$ 1,300,000,000.0000									$ 500,000,000.0000		$ 800,000,000.0000
Debt instrument interest rate																5.50%		6.25%
Debt Instrument, Maturity Date															Oct. 15, 2019		Oct. 15, 2022