v3.8.0.1
Equity, Equity Activity (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Changes in carrying amount of Equity          
Balance at December 31, 2016 $ 1,751   $ 1,751   $ 1,542
Proceeds from issuance of units, net of issuance costs     287    
Distributions to unitholders and general partner (a) [1]     (427)    
Net earnings attributable to partners 97 $ 88 [2] 299 $ 263 [2]  
Contributions (b) [3]     41    
Equity offering under ATM program, net of issuance costs     3    
Other     6    
Balance at September 30, 2017 1,751   1,751    
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 (a) [1]     (300)    
Net earnings attributable to partners 57 47 180 153  
Contributions (b) [3]     39    
Equity offering under ATM program, net of issuance costs     3    
Other     1    
Balance at September 30, 2017 1,812   1,812    
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 (a) [1]     (127)    
Net earnings attributable to partners 40 $ 34 119 $ 89  
Contributions (b) [3]     2    
Equity offering under ATM program, net of issuance costs     0    
Other     5    
Balance at September 30, 2017 $ (61)   $ (61)    
[1] (a)This distribution is net of $12.5 million waived by TLGP on either IDRs or common units for each of the three months ended September 30, 2017, June 30, 2017, and March 31, 2017.
[2] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.
[3] (b)This distribution was declared on October 18, 2017 and will be paid on the date of distribution.