Segment Information - Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]    
Capital expenditures and investments [1] $ 748 $ 1,325
Plus items not allocated to segments:    
Capital expenditures [2] 707 759
MarEn Bakken    
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]    
Less: Investments in equity method investees   500
Operating Segments    
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]    
Capital expenditures and investments [3] 712 1,297
Less: Investments in equity method investees 41 566 [4]
Corporate and Other    
Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures [Line Items]    
Capital expenditures and investments [5] 36 28
Plus items not allocated to segments:    
Corporate 18 16
Capitalized interest $ 18 $ 12
[1] Capital expenditures include changes in capital accruals, acquisitions and investments in affiliates.
[2] Capital expenditures include changes in capital accruals. See Note 18 for a reconciliation of total capital expenditures to additions to property, plant and equipment as reported in the consolidated statements of cash flows.Revenues by product line were as follows: Three Months Ended March 31,(In millions)2018 2017Refined products$16,158 $13,876Merchandise1,130 1,192Crude oil and refinery feedstocks883 687Service, transportation and other523 379Sales and other operating revenues $18,694 $16,134
[3] Capital expenditures include changes in capital accruals, acquisitions and investments in affiliates.
[4] The three months ended March 31, 2017 includes an investment of $500 million in MarEn Bakken related to the Bakken Pipeline system.
[5] Includes capitalized interest of $18 million and $12 million for the three months ended March 31, 2018 and 2017, respectively