Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Successor [Member]
Current assets:
Cash and cash equivalents	$ 2,127
Accounts receivable, less allowances of $57 and $130, respectively	458
Contract acquisition costs
Prepaid expenses	73
Income taxes and other current assets	30
Total current assets	2,688
Property, plant and equipment, net	9,199
Intangibles, net	4,227
Other assets	367
Total assets	16,481
Current liabilities:
Long-term debt due within one year	15
Accounts payable	535
Advanced billings	197
Accrued other taxes	183
Accrued interest	76
Pension and other postretirement benefits	46
Other current liabilities	399
Total current liabilities	1,451
Deferred income taxes	387
Pension and other postretirement benefits	1,672
Other liabilities	403
Long-term debt	7,968
Total liabilities not subject to compromise	11,881
Liabilities subject to compromise
Total liabilities	11,881
Equity (Deficit):
Common stock	2
Additional paid-in capital	4,124
Retained earnings (accumulated deficit)	414
Accumulated other comprehensive income (loss), net of tax	60
Treasury common stock
Total equity (deficit)	4,600
Total liabilities and equity (deficit)	16,481
Predecessor [Member]
Current assets:
Cash and cash equivalents		1,829
Accounts receivable, less allowances of $57 and $130, respectively		553
Contract acquisition costs		97
Prepaid expenses		90
Income taxes and other current assets		85
Total current assets		2,654
Property, plant and equipment, net		12,931
Intangibles, net		677
Other assets		533
Total assets		16,795
Current liabilities:
Long-term debt due within one year		5,781
Accounts payable		540
Advanced billings		202
Accrued other taxes		204
Accrued interest		47
Pension and other postretirement benefits		48
Other current liabilities		318
Total current liabilities		7,140
Deferred income taxes		343
Pension and other postretirement benefits		2,195
Other liabilities		452
Long-term debt
Total liabilities not subject to compromise		10,130
Liabilities subject to compromise		11,565
Total liabilities		21,695
Equity (Deficit):
Common stock		27
Additional paid-in capital		4,817
Retained earnings (accumulated deficit)		(8,975)
Accumulated other comprehensive income (loss), net of tax		(755)
Treasury common stock		(14)
Total equity (deficit)		(4,900)
Total liabilities and equity (deficit)		$ 16,795