Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities
Net Income	$ 21,748	$ 22,618	$ 18,348
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	17,099	16,206	16,720
Employee retirement benefits	(2,046)	(3,391)	840
Deferred income taxes	2,973	4,264	1,553
Provision for expected credit losses	1,611	789	1,380
Equity in losses (earnings) of unconsolidated businesses, net of dividends received	(10)	36	91
Changes in current assets and liabilities, net of effects from acquisition/disposition of businesses:
Accounts receivable	(1,978)	(1,592)	189
Inventories	627	(905)	(369)
Prepaid expenses and other	928	150	1,202
Accounts payable and accrued liabilities and Other current liabilities	(33)	1,457	(966)
Other, net	(3,778)	(93)	2,780
Net cash provided by operating activities	37,141	39,539	41,768
Cash Flows from Investing Activities
Capital expenditures (including capitalized software)	(23,087)	(20,286)	(18,192)
Cash received (paid) related to acquisitions of businesses, net of cash acquired	248	(4,065)	(520)
Acquisitions of wireless licenses	(3,653)	(47,596)	(3,896)
Collateral payments related to derivative contracts, net of repayments	(2,265)	(21)	0
Proceeds from disposition of business	33	4,122	0
Other, net	62	693	(904)
Net cash used in investing activities	(28,662)	(67,153)	(23,512)
Cash Flows from Financing Activities
Proceeds from long-term borrowings	7,074	33,034	25,822
Proceeds from asset-backed long-term borrowings	10,732	8,383	5,635
Net proceeds from (repayments of) short-term commercial paper	106	0	(9)
Repayments of long-term borrowings and finance lease obligations	(8,616)	(14,063)	(9,775)
Repayments of asset-backed long-term borrowings	(4,948)	(4,800)	(7,413)
Dividends paid	(10,805)	(10,445)	(10,232)
Other, net	(2,072)	(3,832)	(2,703)
Net cash provided by (used in) financing activities	(8,529)	8,277	1,325
Increase (decrease) in cash, cash equivalents and restricted cash	(50)	(19,337)	19,581
Cash, cash equivalents and restricted cash, beginning of period	4,161	23,498	3,917
Cash, cash equivalents and restricted cash, end of period	$ 4,111	$ 4,161	$ 23,498