Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 3,310	$ 5,409
Accounts receivable, net of allowance for credit losses of $206 and $176	5,084	4,276
Equipment installment plan receivables, net of allowance for credit losses and imputed discount of $646 and $656	4,599	4,379
Inventory	2,370	1,607
Prepaid expenses	1,128	880
Other current assets	5,212	1,853
Total current assets	21,703	18,404
Property and equipment, net	38,718	38,533
Operating lease right-of-use assets	26,070	25,398
Financing lease right-of-use assets	2,955	3,091
Goodwill	13,690	13,005
Spectrum licenses	97,749	100,558
Other intangible assets, net	4,117	2,512
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount of $186 and $158	2,316	2,209
Other assets	9,862	4,325
Total assets	217,180	208,035
Current liabilities
Accounts payable and accrued liabilities	9,193	8,463
Short-term debt	6,333	4,068
Deferred revenue	1,487	1,222
Short-term operating lease liabilities	3,550	3,281
Short-term financing lease liabilities	1,157	1,175
Other current liabilities	2,581	1,965
Total current liabilities	24,301	20,174
Tower obligations	3,568	3,664
Deferred tax liabilities	19,222	16,700
Operating lease liabilities	26,780	26,408
Financing lease liabilities	1,186	1,151
Other long-term liabilities	3,783	4,000
Total long-term liabilities	132,402	126,120
Commitments and contingencies (Note 16)
Stockholders' equity
Common stock, par value $0.00001 per share, 2,000,000,000 shares authorized; 1,275,435,436 and 1,271,074,364 shares issued, 1,118,506,240 and 1,144,579,681 shares outstanding	0	0
Additional paid-in capital	69,267	68,798
Treasury stock, at cost, 156,929,196 and 126,494,683 shares	(28,064)	(20,584)
Accumulated other comprehensive loss	(881)	(857)
Retained earnings	20,155	14,384
Total stockholders' equity	60,477	61,741
Total liabilities and stockholders' equity	217,180	208,035
Nonrelated Party
Current liabilities
Long-term debt	76,365	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.