CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 1,382	$ 1,790
Accounts receivable, net of allowance of $2 at September 30, 2020	699	654
Materials and supplies, net of allowance of $118 and $127 at September 30, 2020 and December 31, 2019, respectively	459	479
Restricted cash accounts and investments	448	558
Other current assets	187	159
Total current assets	3,175	3,640
Property and equipment	23,038	24,281
Less accumulated depreciation	(5,207)	(5,434)
Property and equipment, net	17,831	18,847
Contract intangible assets	450	608
Deferred income taxes, net	19	20
Other assets	997	990
Total assets	22,472	24,105
Liabilities and equity
Accounts payable	214	311
Accrued income taxes	42	64
Debt due within one year	640	568
Other current liabilities	655	781
Total current liabilities	1,551	1,724
Long-term debt	7,794	8,693
Deferred income taxes, net	294	266
Other long-term liabilities	1,430	1,555
Total long-term liabilities	9,518	10,514
Commitments and contingencies
Shares, CHF 0.10 par value, 824,648,925 authorized, 142,365,398 conditionally authorized, 639,674,414 issued and 614,861,972 outstanding at September 30, 2020, and 639,674,422 authorized, 142,365,398 conditionally authorized, 617,970,525 issued and 611,871,374 outstanding at December 31, 2019	60	59
Additional paid-in capital	13,493	13,424
Accumulated deficit	(1,829)	(1,297)
Accumulated other comprehensive loss	(327)	(324)
Total controlling interest shareholders' equity	11,397	11,862
Noncontrolling interest	6	5
Total equity	11,403	11,867
Total liabilities and equity	$ 22,472	$ 24,105