Fair Value Measurements (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)	Jun. 30, 2019 USD ($)
Liabilities:
Carrying value of debt, net of unamortized discount	$ 10,400	$ 10,400
Qatar ISND and ISSD
Liabilities:
Impairment and related charges	416
Total Fair Value
Liabilities:
Estimated fair value of debt	10,300	10,700
Recurring | Accrued liabilities
Liabilities:
Netting and Collateral	0	0
Recurring | Accrued liabilities | Total Fair Value
Liabilities:
Embedded derivatives	66	43
Recurring | Accrued liabilities | Level 1
Liabilities:
Embedded derivatives	0	0
Recurring | Accrued liabilities | Level 2
Liabilities:
Embedded derivatives	66	43
Recurring | Accrued liabilities | Level 3
Liabilities:
Embedded derivatives	0	0
Recurring | Deferred credits and other liabilities - other
Liabilities:
Netting and Collateral	0	0
Recurring | Deferred credits and other liabilities - other | Total Fair Value
Liabilities:
Embedded derivatives	116	73
Recurring | Deferred credits and other liabilities - other | Level 1
Liabilities:
Embedded derivatives	0	0
Recurring | Deferred credits and other liabilities - other | Level 2
Liabilities:
Embedded derivatives	116	73
Recurring | Deferred credits and other liabilities - other | Level 3
Liabilities:
Embedded derivatives	$ 0	$ 0
Non recurring | Measurement Input, Discount Rate
Liabilities:
Risk adjusted discount rate	0.10