Impairments - Narrative (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) compressor	Dec. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Asset impairment	$ 3	$ 53	$ 5
Natural gas compressors, difference between carrying value and fair value
Property, Plant and Equipment [Line Items]
Asset impairment		$ 45
Equipment, number of units \| compressor		890

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Period Type:	duration