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REVENUE (Tables) | 3 Months Ended
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Mar. 31, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue |
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution |  | Green Power and Transmission |  | Energy Services |  | Eliminations and Other |  | Consolidated |
Three months ended March 31, 2018
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |  |  |
Transportation revenue | 2,058 |  | 952 |  | 239 |  | — |  | — |  | — |  | 3,249 |
Storage and other revenue | 40 |  | 60 |  | 66 |  | — |  | — |  | — |  | 166 |
Gas gathering and processing revenue | — |  | 205 |  | — |  | — |  | — |  | — |  | 205 |
Gas distribution revenue | — |  | — |  | 1,926 |  | — |  | — |  | — |  | 1,926 |
Electricity and transmission revenue | — |  | — |  | — |  | 154 |  | — |  | — |  | 154 |
Commodity sales | — |  | 693 |  | — |  | — |  | — |  | — |  | 693 |
Total revenue from contracts with customers | 2,098 |  | 1,910 |  | 2,231 |  | 154 |  | — |  | — |  | 6,393 |
Commodity sales | — |  | — |  | — |  | — |  | 6,575 |  | — |  | 6,575 |
Other revenue 1 | (269 | ) | 25 |  | 2 |  | 3 |  | — |  | (3 | ) | (242 | )
Intersegment revenue | 80 |  | 2 |  | 4 |  | — |  | 57 |  | (143 | ) | — |
Total revenue | 1,909 |  | 1,937 |  | 2,237 |  | 157 |  | 6,632 |  | (146 | ) | 12,726 |
1 | Includes mark-to-market gains/(losses) from our hedging program.
Contract with Customer, Asset and Liability |
| Receivables | Contract Assets | Contract Liabilities
(millions of Canadian dollars) |  |  |
Balance at adoption date | 2,475 |  | 290 |  | 992 |
Balance at reporting date | 2,533 |  | 290 |  | 1,008 |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles | The below table presents the cumulative, immaterial effect of the adoption of ASC 606 on our Consolidated Statement of Financial Position as at January 1, 2018 on each affected financial statement line item along with explanations of those effects. For the three months ended March 31, 2018, the effect of the adoption of ASC 606 on our Consolidated Statement of Earnings was not material.
| Balance at December 31, 2017 | Adjustments Due to ASC 606 | Balance at January 1, 2018
(millions of Canadian dollars) |  |  |
Assets |  |  |
Deferred amounts and other assets 1,2 | 6,442 |  | (170 | ) | 6,272 |
Property, plant and equipment, net 2 | 90,711 |  | 112 |  | 90,823 |
Liabilities and equity |  |  |
Accounts payable and other 1,2 | 9,478 |  | 62 |  | 9,540 |
Other long-term liabilities 2 | 7,510 |  | 66 |  | 7,576 |
Deferred income taxes 1,2 | 9,295 |  | (62 | ) | 9,233 |
Redeemable noncontrolling interests 1,2 | 4,067 |  | (38 | ) | 4,029 |
Deficit 1,2 | (2,468 | ) | (86 | ) | (2,554 | )
1 | Revenue was previously recognized for a certain contract within the Liquids Pipelines business unit using a formula-based method. Under the new revenue standard, revenue is recognized on a straight-line basis over the term of the agreement in order to reflect the fulfillment of our performance obligation to provide up to a specified volume of pipeline capacity throughout the term of the contract.
2 | Certain payments received from customers to offset the cost of constructing assets required to provide services to those customers, referred to as Contributions in Aid of Construction (CIACs) were previously recorded as reductions of property, plant and equipment regardless of whether the amounts were imposed by regulation or arose from negotiations with customers. Under the new revenue standard, CIACs which are negotiated as part of an agreement to provide transportation and other services to a customer are deemed to be advance payments for future services and are recognized as revenue when those future services are provided. Accordingly, negotiated CIACs are accounted for as deferred revenue and recognized as revenue over the term of the associated revenue contract. Amounts which are required to be collected from the customer based on requirements of the regulator continue to be accounted for as reductions of property, plant and equipment.
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution |  | Green Power and Transmission |  | Energy Services |  | Consolidated |
Three months ended March 31, 2018
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |
Revenue from products transferred at a point in time 1 | — |  | 693 |  | 25 |  | — |  | — |  | 718 |
Revenue from products and services transferred over time 2 | 2,098 |  | 1,217 |  | 2,206 |  | 154 |  | — |  | 5,675 |
Total revenue from contracts with customers | 2,098 |  | 1,910 |  | 2,231 |  | 154 |  | — |  | 6,393 |
1 | Revenue from sales of crude oil, natural gas and NGLs.
2 | Revenue from crude oil and natural gas pipeline transportation, storage, natural gas gathering, compression and treating, natural gas distribution, natural gas storage services and electricity sales.

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