Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,829	$ 760
Accounts receivable, less allowances of $130 and $120, respectively	553	629
Contract acquisition costs	97	105
Prepaid expenses	90	89
Assets held for sale		1,401
Income taxes and other current assets	85	53
Total current assets	2,654	3,037
Property, plant and equipment, net	12,931	12,963
Other intangibles, net	677	1,020
Other assets	533	468
Total assets	16,795	17,488
Current liabilities:
Long-term debt due within one year	5,781	994
Accounts payable	540	437
Advanced billings	202	219
Accrued other taxes	204	206
Accrued interest	47	407
Pension and other postretirement benefits	48	43
Liabilities held for sale		123
Other current liabilities	318	375
Total current liabilities	7,140	2,804
Deferred income taxes	343	462
Pension and other postretirement benefits	2,195	1,896
Other liabilities	452	412
Long-term debt		16,308
Total liabilities not subject to compromise	10,130	21,882
Liabilities subject to compromise	11,565
Total liabilities	21,695	21,882
Equity (Deficit):
Common stock, $0.25 par value (175,000 authorized shares, 106,025 issued, and 104,793 and 105,131 outstanding, at December 31, 2020 and 2019, respectively)	27	27
Additional paid-in capital	4,817	4,815
Accumulated deficit	(8,975)	(8,573)
Accumulated other comprehensive loss, net of tax	(755)	(650)
Treasury common stock	(14)	(13)
Total equity (deficit)	(4,900)	(4,394)
Total liabilities and equity (deficit)	$ 16,795	$ 17,488