CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Restricted cash (includes $368 million and $201 million related to VIEs at respective dates)	$ 373	$ 213
Allowance for doubtful accounts	537	166
Customers (net of allowance for doubtful accounts of $537 million and $166 million at respective dates) (includes $1.78 billion and $2.47 billion related to VIEs, net of allowance for doubtful accounts of $537 million and $166 million at respective dates)	2,178	2,645
Accrued unbilled revenue (includes $1.13 billion and $1.16 billion related to VIEs at respective dates)	1,305	1,304
Long-term debt, classified as current (includes $173 million and $168 million related to VIEs at respective dates)	3,599	2,268
Interest payable (includes $137 million and $116 million related to VIEs at respective dates)	592	626
Long-term debt (includes $10.51 billion and $10.31 billion related to VIEs at respective dates)	$ 50,343	$ 47,742
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)	2,133,508,181	1,987,784,948
Treasury stock, shares at cost (in shares)	67,743,590	247,743,590
Variable Interest Entity, Primary Beneficiary
Restricted cash (includes $368 million and $201 million related to VIEs at respective dates)	$ 368	$ 201
Allowance for doubtful accounts	537	166
Customers (net of allowance for doubtful accounts of $537 million and $166 million at respective dates) (includes $1.78 billion and $2.47 billion related to VIEs, net of allowance for doubtful accounts of $537 million and $166 million at respective dates)	1,780	2,470
Accrued unbilled revenue (includes $1.13 billion and $1.16 billion related to VIEs at respective dates)	1,130	1,160
Net noncurrent accounts receivable	0	17
Noncurrent allowance for doubtful accounts	0	1
Long-term debt, classified as current (includes $173 million and $168 million related to VIEs at respective dates)	173	168
Interest payable (includes $137 million and $116 million related to VIEs at respective dates)	137	116
Long-term debt (includes $10.51 billion and $10.31 billion related to VIEs at respective dates)	$ 10,510	$ 10,310