v3.8.0.1
Equity, Equity Activity (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Dec. 31, 2016
Changes in carrying amount of Equity        
Balance at December 31, 2016 $ 3,519   $ 3,519 $ 1,542
Proceeds from issuance of units, net of issuance costs 287      
Distributions to unitholders and general partner (b) [1] (460)      
Net earnings attributable to partners [2] 299 $ 263    
Contributions (c) [3] 41      
Equity offering under ATM program, net of issuance costs 3      
Other 11      
Balance at September 30, 2017 3,519      
Partners' Capital Account, Exchanges and Conversions 1,781      
Partners' Capital     3,519 [4] 1,542
Net Income (Loss) Attributable To Predecessors [2] (15) 21    
Predecessor Equity        
Changes in carrying amount of Equity        
Proceeds from issuance of units, net of issuance costs [5] 0      
Distributions to unitholders and general partner (b) [1],[5] (33)      
Net earnings attributable to partners [5] 0      
Contributions (c) [3],[5] 0      
Equity offering under ATM program, net of issuance costs [5] 0      
Other [5] 5      
Partners' Capital Account, Exchanges and Conversions [5] 1,781      
Partners' Capital [5]     1,768 0
Net Income (Loss) Attributable To Predecessors [5] (15)      
Common        
Changes in carrying amount of Equity        
Balance at December 31, 2016 1,812   1,812 1,608
Proceeds from issuance of units, net of issuance costs 281      
Distributions to unitholders and general partner (b) [1] (300)      
Net earnings attributable to partners 180 153    
Contributions (c) [3] 39      
Equity offering under ATM program, net of issuance costs 3      
Other 1      
Balance at September 30, 2017 1,812      
Partners' Capital Account, Exchanges and Conversions 0      
Net Income (Loss) Attributable To Predecessors 0      
General Partner        
Changes in carrying amount of Equity        
Balance at December 31, 2016 (61)   $ (61) $ (66)
Proceeds from issuance of units, net of issuance costs 6      
Distributions to unitholders and general partner (b) [1] (127)      
Net earnings attributable to partners 119 $ 89    
Contributions (c) [3] 2      
Equity offering under ATM program, net of issuance costs 0      
Other 5      
Balance at September 30, 2017 (61)      
Partners' Capital Account, Exchanges and Conversions 0      
Net Income (Loss) Attributable To Predecessors $ 0      
[1] Represents cash distributions declared and paid during the nine months ended September 30, 2017, relating to the fourth quarter of 2016 through the second quarter of 2017.
[2] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.
[3] Includes Andeavor and TLGP contributions to the Partnership primarily related to reimbursements for capital spending pursuant predominantly to the Amended Omnibus Agreement and the Carson Assets Indemnity Agreement.
[4] (a)Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.
[5] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.