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CONSOLIDATED STATEMENTS OF CASH FLOWS
$ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Operating Activities      
Net income $ 574 $ 528 [1] $ 391 [1]
Adjusted for the following items:      
Earnings from investments in associates and joint ventures, net of distributions received (52) (202) 18
Depreciation and amortization expense 671 447 375
Mark-to-market on hedging items, provisions and other 90 (47) (44)
Deferred income tax expense (recovery) 67 (18) (26)
Changes in non-cash working capital, net 131 45 (82)
Cash from operating activities 1,481 753 632
Investing Activities      
Acquisition of subsidiaries, net of cash acquired (4,223) (520) (54)
Disposal of subsidiaries, net of cash disposed 0 353 28
Additions of investments in associates and joint ventures (620) (887) (681)
Purchase of long lived assets (714) (690) (520)
Disposal of long lived assets 47 7 10
Purchase of financial assets (318) (191) (1,724)
Sale of financial assets and other 258 727 376
Net settlement of foreign exchange hedging items (151) 143 219
Cash used by investing activities (5,721) (1,058) (2,346)
Financing Activities      
Distributions to general partner (114) (84) (66)
Distributions to other unitholders (680) (544) (480)
Subsidiary distributions to non-controlling interest (831) (169) (91)
Capital provided by non-controlling interest 2,847 835 302
Capital provided to non-controlling interest 0 (51) 0
Proceeds from corporate borrowings 537 0 738
Repayment of corporate borrowings (306) 0 0
Proceeds from corporate credit facility 2,403 2,316 823
Repayment of corporate credit facility (1,614) (2,723) (662)
Proceeds from subsidiary borrowings 668 1,406 348
Repayment of subsidiary borrowings (308) (984) (295)
Proceeds from other financing activities 0 0 131
Repayment of other financing activities 0 (38) (38)
Preferred units issued 220 186 189
Partnership units issued, net of issuance costs 992 755 932
Partnership units repurchased 0 (6) (67)
Cash from financing activities 3,814 899 1,764
Cash and cash equivalents      
Change during the year (426) 594 50
Impact of foreign exchange on cash 14 (7) (32)
Cash reclassified as held for sale 0 0 (8)
Balance, beginning of year 786 199 189
Balance, end of year $ 374 $ 786 $ 199
[1] Certain net income allocations have been reclassified to provide comparability with the current year consolidated statements of partnership capital.