The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

SUBSEQUENT EVENTS SUBSEQUENT EVENTS (Details) - Closed sale - Subsequent event $ in Millions, $ in Millions	May 01, 2020 CAD ($)	Apr. 01, 2020 USD ($)	Apr. 01, 2020 CAD ($)
Ozark assets
Subsequent Event [Line Items]
Proceeds from dispositions		$ 43	$ 60
Montana-Alberta Tie Line assets
Subsequent Event [Line Items]
Proceeds from dispositions	$ 180