Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 10,259	$ 5,409
Accounts receivable, net of allowance for credit losses of $172 and $176	4,598	4,276
Equipment installment plan receivables, net of allowance for credit losses and imputed discount of $625 and $656	4,226	4,379
Inventory	1,690	1,607
Prepaid expenses	1,125	880
Other current assets	4,874	1,853
Total current assets	26,772	18,404
Property and equipment, net	37,481	38,533
Operating lease right-of-use assets	24,735	25,398
Financing lease right-of-use assets	3,105	3,091
Goodwill	13,460	13,005
Spectrum licenses	95,928	100,558
Other intangible assets, net	2,438	2,512
Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount of $151 and $158	1,975	2,209
Other assets	6,749	4,325
Total assets	212,643	208,035
Current liabilities
Accounts payable and accrued liabilities	7,802	8,463
Short-term debt	6,408	4,068
Deferred revenue	1,217	1,222
Short-term operating lease liabilities	3,343	3,281
Short-term financing lease liabilities	1,157	1,175
Other current liabilities	2,175	1,965
Total current liabilities	22,102	20,174
Tower obligations	3,603	3,664
Deferred tax liabilities	18,468	16,700
Operating lease liabilities	25,646	26,408
Financing lease liabilities	1,188	1,151
Other long-term liabilities	4,014	4,000
Total long-term liabilities	129,434	126,120
Commitments and contingencies (Note 14)
Stockholders' equity
Common stock, par value $0.00001 per share, 2,000,000,000 shares authorized; 1,274,176,396 and 1,271,074,364 shares issued, 1,127,450,618 and 1,144,579,681 shares outstanding	0	0
Additional paid-in capital	69,008	68,798
Treasury stock, at cost, 146,725,778 and 126,494,683 shares	(25,569)	(20,584)
Accumulated other comprehensive loss	(908)	(857)
Retained earnings	18,576	14,384
Total stockholders' equity	61,107	61,741
Total liabilities and stockholders' equity	212,643	208,035
Nonrelated Party
Current liabilities
Long-term debt	75,018	72,700
Related Party
Current liabilities
Long-term debt	$ 1,497	$ 1,497

Sale Leaseback Transaction, Tower Obligation

No definition available.

Name:	tmus_SaleLeasebackTransactionTowerObligation
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.