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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Cash Generated from Operations        
Net income $ 65 $ 55 $ 241 $ 193
Depreciation 25 25 73 73
Amortization of debt issue costs reported as interest expense     1 1
Amortization of realized loss on derivative instrument (Note 13)     2 1
Equity earnings from equity investments (Note 5) (34) (27) (129) (87)
Distributions received from operating activities of equity investments (Note 5)     142 106
Change in other long term liabilities     (1)  
Change in operating working capital (Note 11)     25 24
Net Cash Provided by (Used in) Operating Activities     354 311
Investing Activities        
Distribution received from Iroquois as return of investment (Note 5)     8 3
Capital expenditures     (28) (26)
Net Cash Provided by (Used in) Investing Activities     (24) (756)
Financing Activities        
Distributions paid (Note 10)     (171) (210)
Distributions paid to non-controlling interests     (11) (5)
Common unit issuance, net (Note 8)     40 126
Long-term debt issued, net (Note 7)     159 732
Long-term debt repaid (Note 7)     (316) (164)
Debt issuance costs     (1) (2)
Total financing activities     (315) 454
Increase in cash and cash equivalents     15 9
Cash and Cash Equivalents, beginning of period     33 64
Cash and Cash Equivalents, end of period 48 73 48 73
Class B Units        
Financing Activities        
Distributions paid to Class B units (Note 8)     (15) (22)
Northern Border        
Cash Generated from Operations        
Equity earnings from equity investments (Note 5) (16) (16) (49) (50)
Investing Activities        
Investment/Acquisition of interests       (83)
Great Lakes        
Cash Generated from Operations        
Equity earnings from equity investments (Note 5) $ (9) $ (2) (45) (24)
Investing Activities        
Investment/Acquisition of interests     $ (4) (4)
Portland Natural Gas Transmission System        
Financing Activities        
Distributions paid to former parent of PNGTS       (1)
Portland Natural Gas Transmission System And Iroquois Acquisition        
Investing Activities        
Investment/Acquisition of interests       $ (646)