Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 5,598	$ 5,409
Accounts receivable, net of allowance for credit losses of $226 and $176	4,874	4,276
Equipment installment plan receivables, net of allowance for credit losses and imputed discount of $733 and $656	4,997	4,379
Inventory	2,405	1,607
Prepaid expenses	1,215	880
Other current assets	5,372	1,853
Total current assets	24,461	18,404
Property and equipment, net	38,333	38,533
Operating lease right-of-use assets	25,692	25,398
Financing lease right-of-use assets	2,760	3,091
Goodwill	13,678	13,005
Spectrum licenses	98,032	100,558
Other intangible assets, net	3,843	2,512
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount of $213 and $158	2,683	2,209
Other assets	9,755	4,325
Total assets	219,237	208,035
Current liabilities
Accounts payable and accrued liabilities	10,280	8,463
Short-term debt	5,135	4,068
Deferred revenue	1,533	1,222
Short-term operating lease liabilities	3,814	3,281
Short-term financing lease liabilities	1,163	1,175
Other current liabilities	2,575	1,965
Total current liabilities	24,500	20,174
Long-term debt	81,147	74,197
Tower obligations	3,532	3,664
Deferred tax liabilities	19,583	16,700
Operating lease liabilities	26,371	26,408
Financing lease liabilities	1,107	1,151
Other long-term liabilities	3,794	4,000
Total long-term liabilities	135,534	126,120
Commitments and contingencies (Note 18)
Stockholders' equity
Common stock, par value $0.00001 per share, 2,000,000,000 shares authorized; 1,275,774,235 and 1,271,074,364 shares issued, 1,106,930,661 and 1,144,579,681 shares outstanding	0	0
Additional paid-in capital	69,460	68,798
Treasury stock, at cost, 168,843,574 and 126,494,683 shares	(30,545)	(20,584)
Accumulated other comprehensive loss	(848)	(857)
Retained earnings	21,136	14,384
Total stockholders' equity	59,203	61,741
Total liabilities and stockholders' equity	219,237	208,035
Nonrelated Party
Current liabilities
Long-term debt	79,649	72,700
Related Party
Current liabilities
Long-term debt	$ 1,498	$ 1,497

Sale Leaseback Transaction, Tower Obligation

No definition available.

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Namespace Prefix:	tmus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.