CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Generated from Operations
Net income	$ 100	$ 102
Depreciation and amortization	20	24
Amortization of debt issue costs reported as interest expense		1
Equity earnings from equity investments (Note 5)	(54)	(59)
Distributions received from operating activities of equity investments (Note 5)	56	43
Change in operating working capital (Note 11)	13	6
Cash generated from operations	135	117
Investing Activities
Investment in Great Lakes (Note 5)	(5)	(4)
Distribution received from Iroquois as return of investment (Note 5)	2	2
Capital expenditures	(16)	(2)
Customer advances for construction	2
Investing activities	(17)	(4)
Financing Activities
Distributions paid to common units, including the general partner (Note 10)	(47)	(76)
Distributions paid to Class B units (Note 8)	(13)	(15)
Distributions paid to non-controlling interests	(7)	(1)
Common unit issuance, net		40
Long-term debt issued, net of discount (Note 7)	18	75
Long-term debt repaid (Note 7)	(50)	(101)
Financing activities	(99)	(78)
Increase in cash and cash equivalents	19	35
Cash and cash equivalents, beginning of period	33	33
Cash and cash equivalents, end of period	$ 52	$ 68