Lease Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lease, Cost	$ 227
Operating Lease, Payments	19	[1]
Operating Lease, Payments, Use	42	[1]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 44
Operating Lease, Weighted Average Remaining Lease Term	1 year 4 months 9 days
Operating Lease, Weighted Average Discount Rate, Percent	5.00%
Upstream Equipment [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Cost	$ 42	[1]
Variable Lease, Cost	6	[1]
Short-term Lease, Cost	41	[2]
Other Energy Equipment [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Cost	19	[1]
Variable Lease, Cost	3	[1]
Short-term Lease, Cost	$ 116	[2]

[1] Amounts are presented before recovery of amounts billed to or reimbursed by other working interest owners.

[2] Includes variable lease costs on short-term leases.