CONSOLIDATED STATEMENTS OF CASH FLOWS - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Earnings	$ 3,416	$ 5,827	$ 3,333
Adjustments to reconcile earnings to net cash provided by operating activities:
Depreciation and amortization	3,712	3,391	3,246
Deferred income tax expense/(recovery) (Note 25)	447	1,156	(148)
Changes in unrealized (gain)/loss on derivative instruments, net (Note 24)	(756)	(1,751)	903
Earnings from equity investments	(1,136)	(1,503)	(1,509)
Distributions from equity investments	1,392	1,804	1,539
Impairment of long-lived assets	0	423	1,104
Impairment of equity investments	2,351	0	0
Impairment of goodwill	0	0	1,019
(Gain)/loss on dispositions	(6)	254	8
Other	268	56	92
Changes in operating assets and liabilities (Note 28)	93	(259)	915
Net cash provided by operating activities	9,781	9,398	10,502
Investing activities
Capital expenditures	(5,405)	(5,492)	(6,806)
Long-term investments and restricted long-term investments	(487)	(1,159)	(1,312)
Distributions from equity investments in excess of cumulative earnings	705	417	1,277
Additions to intangible assets	(215)	(200)	(540)
Acquisition	(24)	0	0
Proceeds from dispositions	265	2,110	4,452
Other	0	(20)	(12)
Affiliate loans, net	(16)	(314)	(76)
Net cash used in investing activities	(5,177)	(4,658)	(3,017)
Financing activities
Net change in short-term borrowings (Note 18)	223	(127)	(420)
Net change in commercial paper and credit facility draws	1,542	825	(2,256)
Debenture and term note issues, net of issue costs	5,230	6,176	3,537
Debenture and term note repayments	(4,463)	(4,668)	(4,445)
Sale of noncontrolling interest in subsidiary	0	0	1,289
Contributions from noncontrolling interests	23	12	24
Distributions to noncontrolling interests	(300)	(254)	(857)
Contributions from redeemable noncontrolling interests	0	0	70
Distributions to redeemable noncontrolling interests	0	0	(325)
Sponsored Vehicle buy-in cash payment	0	0	(64)
Redemption of noncontrolling interests	0	(300)	(210)
Common shares issued	5	18	21
Preference share dividends	(380)	(383)	(364)
Common share dividends	(6,560)	(5,973)	(3,480)
Other	(90)	(71)	(23)
Net cash used in financing activities	(4,770)	(4,745)	(7,503)
Effect of translation of foreign denominated cash and cash equivalents and restricted cash	(20)	44	68
Net increase/(decrease) in cash and cash equivalents and restricted cash	(186)	39	50
Cash and cash equivalents and restricted cash at beginning of year	676	637	587
Cash and cash equivalents and restricted cash at end of year	490	676	637
Supplementary cash flow information
Cash paid for income taxes	524	571	277
Cash paid for interest, net of amount capitalized	2,538	2,738	2,508
Property, plant and equipment non-cash accruals	$ 801	$ 730	$ 847