Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

The following tables provide fair-value measurement information for embedded derivatives that are measured on a recurring basis:

millions	Fair-Value Measurements Using
Embedded derivatives	Level 1		Level 2		Level 3		Netting and Collateral		Total Fair Value
As of September 30, 2019
Accrued liabilities	$	—	$	54	$	—	$	—	$	54
Deferred credits and other liabilities - other	—		73		—		—		73
As of December 31, 2018
Accrued liabilities	$	—	$	66	$	—	$	—	$	66
Deferred credits and other liabilities - other	—		116		—		—		116