CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restricted cash and restricted cash equivalents (includes $263 million and $282 million related to VIEs at respective dates)	$ 273	$ 297	$ 213
Allowance for doubtful accounts	418	445
Customers (net of allowance for doubtful accounts of $418 million and $445 million at respective dates) (includes $1.9 billion and $1.7 billion related to VIEs, net of allowance for doubtful accounts of $418 million and $445 million at respective dates)	2,220	2,048
Accrued unbilled revenue (includes $1.3 billion and $1.1 billion related to VIEs at respective dates)	1,487	1,254
Other (net of allowance for doubtful accounts of $35 million and $35 million at respective dates)	35	35
Long-term debt, classified as current (includes $222 million and $176 million related to VIEs at respective dates)	2,146	1,376
Interest payable (includes $91 million and $67 million related to VIEs at respective dates)	760	679
Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates)	$ 53,569	$ 50,975
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	3,600,000,000	3,600,000,000
Common stock, shares outstanding (in shares)	2,193,573,536	2,133,597,758
Variable Interest Entity, Primary Beneficiary
Restricted cash and restricted cash equivalents (includes $263 million and $282 million related to VIEs at respective dates)	$ 263	$ 282
Allowance for doubtful accounts	418	445
Customers (net of allowance for doubtful accounts of $418 million and $445 million at respective dates) (includes $1.9 billion and $1.7 billion related to VIEs, net of allowance for doubtful accounts of $418 million and $445 million at respective dates)	1,900	1,700
Accrued unbilled revenue (includes $1.3 billion and $1.1 billion related to VIEs at respective dates)	1,300	1,100
Noncurrent accounts receivable	82	0
Allowance for doubtful accounts, noncurrent	18	0
Long-term debt, classified as current (includes $222 million and $176 million related to VIEs at respective dates)	222	176
Interest payable (includes $91 million and $67 million related to VIEs at respective dates)	91	67
Long-term debt (includes $10.1 billion and $10.5 billion related to VIEs at respective dates)	$ 10,100	$ 10,500