CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Restricted cash (includes $282 million and $201 million related to VIEs at respective dates)	$ 297	$ 213
Allowance for doubtful accounts	445	166
Customers (net of allowance for doubtful accounts of $445 million and $166 million at respective dates) (includes $1.7 billion and $2.5 billion related to VIEs, net of allowance for doubtful accounts of $445 million and $166 million at respective dates)	2,048	2,645
Accrued unbilled revenue (includes $1.1 billion and $1.2 billion related to VIEs at respective dates)	1,254	1,304
Long-term debt, classified as current (includes $176 million and $168 million related to VIEs at respective dates)	1,376	2,268
Interest payable (includes $67 million and $116 million related to VIEs at respective dates)	679	626
Long-term debt (includes $10.5 billion and $10.3 billion related to VIEs at respective dates)	$ 50,975	$ 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)	2,133,597,758	1,987,784,948
Treasury stock, shares at cost (in shares)	0	247,743,590
Variable Interest Entity, Primary Beneficiary
Restricted cash (includes $282 million and $201 million related to VIEs at respective dates)	$ 282	$ 201
Allowance for doubtful accounts	445	166
Customers (net of allowance for doubtful accounts of $445 million and $166 million at respective dates) (includes $1.7 billion and $2.5 billion related to VIEs, net of allowance for doubtful accounts of $445 million and $166 million at respective dates)	1,700	2,500
Accrued unbilled revenue (includes $1.1 billion and $1.2 billion related to VIEs at respective dates)	1,100	1,200
Net noncurrent accounts receivable	0	17
Noncurrent allowance for doubtful accounts	0	1
Long-term debt, classified as current (includes $176 million and $168 million related to VIEs at respective dates)	176	168
Interest payable (includes $67 million and $116 million related to VIEs at respective dates)	67	116
Long-term debt (includes $10.5 billion and $10.3 billion related to VIEs at respective dates)	$ 10,500	$ 10,300