CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 435	$ 762
Accounts receivable, net of allowance of $2 at September 30, 2024 and December 31, 2023	594	512
Materials and supplies, net of allowance of $176 and $198 at September 30, 2024 and December 31, 2023, respectively	425	426
Assets held for sale	345	49
Restricted cash and cash equivalents	365	233
Other current assets	179	144
Total current assets	2,343	2,126
Property and equipment	22,412	23,875
Less accumulated depreciation	(6,424)	(6,934)
Property and equipment, net	15,988	16,941
Contract intangible assets		4
Deferred tax assets, net	165	44
Other assets	1,014	1,139
Total assets	19,510	20,254
Liabilities and equity
Accounts payable	255	323
Accrued income taxes	13	23
Debt due within one year	457	370
Other current liabilities	706	681
Total current liabilities	1,431	1,397
Long-term debt	6,503	7,043
Deferred tax liabilities, net	570	540
Other long-term liabilities	778	858
Total long-term liabilities	7,851	8,441
Commitments and contingencies
Shares, $0.10 par value, 1,057,879,029 authorized, 141,262,093 conditionally authorized, 940,828,901 issued and 875,803,595 outstanding at September 30, 2024, and CHF 0.10 par value, 1,021,294,549 authorized, 142,362,093 conditionally authorized, 843,715,858 issued and 809,030,846 outstanding at December 31, 2023	87	81
Additional paid-in capital	14,871	14,544
Accumulated deficit	(4,552)	(4,033)
Accumulated other comprehensive loss	(179)	(177)
Total controlling interest shareholders' equity	10,227	10,415
Noncontrolling interest	1	1
Total equity	10,228	10,416
Total liabilities and equity	$ 19,510	$ 20,254