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Additional Financial Information (Tables)
 12 Months Ended
Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Income Statement Information
The following tables provide additional financial information related to our consolidated financial statements:

Income Statement Information
(dollars in millions)
Years Ended December 31,202420232022
Depreciation expense$15,112 $14,937 $14,592 
Interest costs on debt balances7,382 7,123 5,429 
Net amortization of debt discount230 219 214 
Capitalized interest costs(963)(1,818)(2,030)
Advertising expense3,976 3,847 3,556 
(dollars in millions)
Years Ended December 31,202420232022
Other income (expense), net
Interest income$336 $354 $146 
Other components of net periodic benefit (cost) income300 (938)2,386 
Net debt extinguishment gains (losses)385 308 (1,077)
Other, net(26)(37)(82)
$995 $(313)$1,373 
Balance Sheet Information
Balance Sheet Information
(dollars in millions)
At December 31,20242023
Prepaid expenses and other
Prepaid taxes$811 $550 
Deferred contract costs2,932 2,756 
Collateral payments related to derivative contracts2,118 1,406 
Restricted cash319 1,244 
Other prepaid expense and other1,793 1,651 
$7,973 $7,607 
Accounts payable and accrued liabilities
Accounts payable$10,425 $10,021 
Accrued expenses5,058 5,190 
Accrued vacation, salaries and wages4,436 4,060 
Interest payable1,553 1,570 
Taxes payable1,902 2,612 
$23,374 $23,453 
Other current liabilities
Dividends payable$2,878 $2,821 
Contract liability7,492 6,955 
Other3,979 2,755 
$14,349 $12,531 
Cash Flow Information
Cash Flow Information
(dollars in millions)
Years Ended December 31,202420232022
Cash Paid
Interest, net of amounts capitalized$5,505 $4,384 $3,316 
Income taxes, net of amounts refunded5,632 2,343 2,736 
Other, net Cash Flows from Operating Activities
Changes in device payment plan agreement non-current receivables$(538)$(2,975)$(4,919)
Net debt extinguishment (gains) losses(385)(308)1,077 
Other, net1,096 (427)64 
$173 $(3,710)$(3,778)
Other, net Cash Flows from Financing Activities
Net debt related costs(1)
$(259)$(73)$(366)
Other, net(816)(1,397)(1,706)
$(1,075)$(1,470)$(2,072)
(1) These costs include the premiums paid for the early extinguishment of debt, fees paid in connection with exchange and tender offers, and settlements of associated instruments.
Supplier Finance Program
The following table presents the confirmed obligations in the SFP and the related activities:
(dollars in millions)
Year Ended December 31,
2024
Confirmed obligations outstanding at the beginning of the year$817 
Invoices added during the year3,549 
Invoices paid during the year(3,594)
Confirmed obligations outstanding at the end of year$772