CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
OPERATING REVENUE	$ 13,108,000,000	$ 14,557,000,000	$ 17,478,000,000
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	6,703,000,000	7,144,000,000	7,868,000,000
Selling, general and administrative	2,972,000,000	3,198,000,000	3,078,000,000
Net loss (gain) on sale of businesses	17,000,000	121,000,000	(113,000,000)
Loss on disposal groups held for sale	0	0	40,000,000
Depreciation and amortization	2,956,000,000	2,985,000,000	3,239,000,000
Goodwill impairment	0	10,693,000,000	3,271,000,000
Total operating expenses	12,648,000,000	24,141,000,000	17,383,000,000
OPERATING INCOME (LOSS)	460,000,000	(9,584,000,000)	95,000,000
OTHER EXPENSE
Interest expense	(1,372,000,000)	(1,158,000,000)	(1,332,000,000)
Net gain on early retirement of debt (Note 7)	348,000,000	618,000,000	214,000,000
Other income (expense), net	334,000,000	(113,000,000)	32,000,000
Total other expense, net	(690,000,000)	(653,000,000)	(1,086,000,000)
LOSS BEFORE INCOME TAXES	(230,000,000)	(10,237,000,000)	(991,000,000)
Income tax (benefit) expense	(175,000,000)	61,000,000	557,000,000
NET LOSS	$ (55,000,000)	$ (10,298,000,000)	$ (1,548,000,000)
BASIC AND DILUTED LOSS PER COMMON SHARE
BASIC (in dollars per share)	$ (0.06)	$ (10.48)	$ (1.54)
DILUTED (in dollars per share)	$ (0.06)	$ (10.48)	$ (1.54)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
BASIC (in shares)	987,680	983,081	1,007,517
DILUTED (in shares)	987,680	983,081	1,007,517