CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 1,395	$ 1,491
Prepayments and other current assets	184	155
Property and equipment, net	15,922	16,045	[1]
Deferred charges and other assets	(856)	(383)	[2],[3]
Accounts payable	411	399
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents	14	14
Prepayments and other current assets	4	6
Property and equipment, net	169	137
Deferred charges and other assets	(32)	(35)
Accounts payable	69	41
Accrued Liabilities, Current	2	1
Liabilities, Other than Long-term Debt, Noncurrent	$ 8	$ 5

[1] Non-operating land assets previously considered as failed sale-leaseback financing obligations were determined to qualify for sale-leaseback accounting under ASC 842 and are now recognized as operating lease liabilities with corresponding ROU assets.

[2] (2) Operating leases previously considered as off-balance sheet obligations are now recognized as operating lease liabilities with corresponding ROU assets.

[3] (3) Accruals associated with future obligations for leases not in use have been applied against the carrying amount of the ROU assets.