$TMUS
T-Mobile US, Inc. Stock $tmus

$tmus Overview Financials Valuation SEC Filings Company Website

2021 Q2 Form 10-Q Financial Statement

#000128369921000150 Filed on August 03, 2021

Income Statement

Concept	2021 Q2	2020 Q2	2020 Q1
Revenue	$19.95B	$17.67B	$11.11B
YoY Change	12.9%	60.95%	0.3%
Cost Of Revenue	$8.624B	$6.725B	$4.168B
YoY Change	28.24%	56.03%	-8.64%
Gross Profit	$11.33B	$10.95B	$6.945B
YoY Change	3.47%	64.13%	6.55%
Gross Profit Margin	56.77%	61.94%	62.49%
Selling, General & Admin	$4.823B	$5.604B	$3.688B
YoY Change	-13.94%	58.17%	7.15%
% of Gross Profit	42.58%	51.2%	53.1%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$4.077B	$4.064B	$1.718B
YoY Change	0.32%	156.4%	7.38%
% of Gross Profit	36.0%	37.13%	24.74%
Operating Expenses	$4.823B	$5.604B	$3.688B
YoY Change	-13.94%	58.17%	7.15%
Operating Profit	$2.106B	$820.0M	$1.539B
YoY Change	156.83%	-46.79%	4.27%
Interest Expense	-$850.0M	-$833.0M	-$272.0M
YoY Change	2.04%	-557.69%	-251.96%
% of Operating Profit	-40.36%	-101.59%	-17.67%
Other Income/Expense, Net	-$851.0M	-$1.028B	-$282.0M
YoY Change	-17.22%	241.53%	3.3%
Pretax Income	$1.255B	-$208.0M	$1.257B
YoY Change	-703.37%	-116.77%	4.49%
Income Tax	$277.0M	$2.000M	$306.0M
% Of Pretax Income	22.07%		24.34%
Net Earnings	$978.0M	$110.0M	$951.0M
YoY Change	789.09%	-88.29%	4.74%
Net Earnings / Revenue	4.9%	0.62%	8.56%
Basic Earnings Per Share	$0.78	$0.09	$1.11
Diluted Earnings Per Share	$0.78	$0.09	$1.10
COMMON SHARES
Basic Shares Outstanding	1.248B shares	1.237B shares	858.1M shares
Diluted Shares Outstanding	1.254B shares	1.237B shares	866.0M shares

Balance Sheet

Concept	2021 Q2	2020 Q2	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$7.793B	$11.08B	$1.112B
YoY Change	-29.64%	902.35%	-22.72%
Cash & Equivalents	$7.793B	$11.08B	$1.112B
Short-Term Investments
Other Short-Term Assets	$1.642B	$2.586B	$2.882B
YoY Change	-36.5%	49.48%	80.35%
Inventory	$1.707B	$1.549B	$1.225B
Prepaid Expenses	$818.0M	$627.0M
Receivables	$4.528B	$3.355B	$1.836B
Other Receivables	$4.082B	$3.218B	$2.432B
Total Short-Term Assets	$20.57B	$24.32B	$9.487B
YoY Change	-15.42%	199.74%	8.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$39.75B	$38.80B	$22.15B
YoY Change	2.45%	77.6%	5.37%
Goodwill	$11.15B	$10.91B	$1.930B
YoY Change	2.22%	473.91%	1.53%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$12.27B	$2.326B	$2.026B
YoY Change	427.34%	36.26%	30.54%
Total Long-Term Assets	$183.6B	$162.9B	$77.74B
YoY Change	12.69%	112.43%	4.59%
TOTAL ASSETS
Total Short-Term Assets	$20.57B	$24.32B	$9.487B
Total Long-Term Assets	$183.6B	$162.9B	$77.74B
Total Assets	$204.1B	$187.2B	$87.23B
YoY Change	9.04%	120.78%	5.0%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.855B	$9.348B	$228.0M
YoY Change	-58.76%	28.76%	-96.89%
Accrued Expenses	$8.133B	$4.164B	$2.187B
YoY Change	95.32%	83.6%	-0.68%
Deferred Revenue	$939.0M	$1.185B	$619.0M
YoY Change	-20.76%	91.13%	-6.92%
Short-Term Debt	$4.648B	$3.818B	$0.00
YoY Change	21.74%	1172.67%	-100.0%
Long-Term Debt Due	$1.045B	$1.040B	$918.0M
YoY Change	0.48%	8.0%	0.77%
Total Short-Term Liabilities	$21.84B	$23.19B	$14.76B
YoY Change	-5.84%	76.05%	10.72%
LONG-TERM LIABILITIES
Long-Term Debt	$65.90B	$62.78B	$10.96B
YoY Change	4.96%	473.15%	0.06%
Other Long-Term Liabilities	$5.229B	$3.494B	$959.0M
YoY Change	49.66%	282.69%	6.2%
Total Long-Term Liabilities	$114.8B	$101.0B	$43.49B
YoY Change	13.67%	126.24%	-0.17%
TOTAL LIABILITIES
Total Short-Term Liabilities	$21.84B	$23.19B	$14.76B
Total Long-Term Liabilities	$114.8B	$101.0B	$43.49B
Total Liabilities	$136.7B	$124.2B	$58.25B
YoY Change	10.02%	114.81%	2.39%
SHAREHOLDERS EQUITY
Retained Earnings	-$3.925B	-$7.839B	-$7.949B
YoY Change	-49.93%	-25.01%	-35.38%
Common Stock	$72.92B	$72.51B	$38.60B
YoY Change	0.57%	89.6%	1.3%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$14.00M	$12.00M	$11.00M
YoY Change	16.67%	50.0%	120.0%
Treasury Stock Shares	1.558M shares	1.549M shares	1.509M shares
Shareholders Equity	$67.47B	$63.00B	$28.98B
YoY Change
Total Liabilities & Shareholders Equity	$204.1B	$187.2B	$87.23B
YoY Change	9.04%	120.78%	5.0%

Cashflow Statement

Concept	2021 Q2	2020 Q2	2020 Q1
OPERATING ACTIVITIES
Net Income	$978.0M	$110.0M	$951.0M
YoY Change	789.09%	-88.29%	4.74%
Depreciation, Depletion And Amortization	$4.077B	$4.064B	$1.718B
YoY Change	0.32%	156.4%	7.38%
Cash From Operating Activities	$3.779B	$777.0M	$1.617B
YoY Change	386.36%	-63.81%	16.16%
INVESTING ACTIVITIES
Capital Expenditures	$3.270B	$2.257B	$1.753B
YoY Change	44.88%	26.16%	-9.22%
Acquisitions	$1.000M	$5.000B	$0.00
YoY Change	-99.98%
Other Investing Activities	-$28.00M	$168.0M	$16.00M
YoY Change	-116.67%		128.57%
Cash From Investing Activities	-$2.083B	-$6.356B	-$1.580B
YoY Change	-67.23%	293.56%	63.56%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$0.00	-$300.0M
YoY Change	-100.0%
Debt Paid & Issued, Net	$3.150B	$10.53B	$0.00
YoY Change	-70.08%	1654.83%
Cash From Financing Activities	-$577.0M	$15.63B	-$453.0M
YoY Change	-103.69%	-1904.62%	138.42%
NET CHANGE
Cash From Operating Activities	$3.779B	$777.0M	$1.617B
Cash From Investing Activities	-$2.083B	-$6.356B	-$1.580B
Cash From Financing Activities	-$577.0M	$15.63B	-$453.0M
Net Change In Cash	$1.119B	$10.05B	-$416.0M
YoY Change	-88.86%	-3108.68%	-276.27%
FREE CASH FLOW
Cash From Operating Activities	$3.779B	$777.0M	$1.617B
Capital Expenditures	$3.270B	$2.257B	$1.753B
Free Cash Flow	$509.0M	-$1.480B	-$136.0M
YoY Change	-134.39%	-513.41%	-74.77%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001283699
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
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CY2021Q2	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2021Q2	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-33409
CY2021Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	1247966318	shares
CY2021Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7793000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10385000000	USD
CY2021Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	123000000	USD
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Registrant Name EntityRegistrantName	T-MOBILE US, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-0836269
	dei	Entity Address Address Line1 EntityAddressAddressLine1	12920 SE 38th Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Bellevue
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98006-1350
	dei	City Area Code CityAreaCode	(425)
	dei	Local Phone Number LocalPhoneNumber	378-4000
	dei	Security12b Title Security12bTitle	Common Stock, par value $0.00001 per share
	dei	Trading Symbol TradingSymbol	TMUS
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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CY2021Q2	us-gaap	Goodwill Goodwill	11152000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	11117000000	USD
CY2021Q2	us-gaap	Indefinite Lived License Agreements IndefiniteLivedLicenseAgreements	82917000000	USD
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CY2021Q2	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	105000000	USD
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	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1811000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1310000000	USD
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1255000000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-208000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2434000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1049000000	USD
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	277000000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	523000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	308000000	USD
CY2021Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	978000000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-210000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1911000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	741000000	USD
CY2021Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	320000000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	320000000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	978000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1911000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	978000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1911000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	12000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	3000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	24000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-273000000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	34000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	2000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	68000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-790000000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	35000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	71000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-790000000	USD
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1013000000	USD
CY2020Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	112000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1982000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	271000000	USD
CY2021Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.78
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.17
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.53
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.71
CY2021Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.26
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.30
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.53
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
CY2021Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.78
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.17
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.52
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.70
CY2021Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.26
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.30
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1247563331	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1236528444	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1245552847	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1047338364	shares
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1253718122	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1236528444	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1254264464	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1057120389	shares
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	978000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1911000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
CY2021Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4077000000	USD
CY2020Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4064000000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	8366000000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5782000000	USD
CY2021Q2	us-gaap	Share Based Compensation ShareBasedCompensation	134000000	USD
CY2020Q2	us-gaap	Share Based Compensation ShareBasedCompensation	259000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	272000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	397000000	USD
CY2021Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	226000000	USD
CY2020Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	98000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	437000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	408000000	USD
CY2021Q2	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	72000000	USD
CY2020Q2	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	233000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	154000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	346000000	USD
CY2021Q2	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	12000000	USD
CY2020Q2	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-30000000	USD
	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	30000000	USD
	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-55000000	USD
CY2021Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-28000000	USD
CY2020Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-163000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-129000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-163000000	USD
CY2021Q2	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020Q2	us-gaap	Asset Impairment Charges AssetImpairmentCharges	418000000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	418000000	USD
CY2021Q2	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1839000000	USD
CY2020Q2	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	498000000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1743000000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1246000000	USD
CY2021Q2	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	568000000	USD
CY2020Q2	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	-127000000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	1295000000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	-196000000	USD
CY2021Q2	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-584000000	USD
CY2020Q2	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	553000000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-863000000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1064000000	USD
CY2021Q2	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-1272000000	USD
CY2020Q2	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-937000000	USD
	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-2396000000	USD
	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-1464000000	USD
CY2021Q2	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	154000000	USD
CY2020Q2	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	104000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	100000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	98000000	USD
CY2021Q2	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	28000000	USD
CY2020Q2	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1261000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1356000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1666000000	USD
CY2021Q2	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-996000000	USD
CY2020Q2	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-1077000000	USD
	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2365000000	USD
	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-1802000000	USD
CY2021Q2	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-47000000	USD
CY2020Q2	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2190000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-264000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2111000000	USD
CY2021Q2	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-4000000	USD
CY2020Q2	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	21000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	65000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	91000000	USD
CY2021Q2	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3779000000	USD
CY2020Q2	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	777000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7440000000	USD
	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	0	USD
CY2021Q2	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	1137000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2394000000	USD
CY2021Q2	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	57000000	USD
CY2020Q2	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	119000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	141000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	231000000	USD
CY2021Q2	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3270000000	USD
CY2020Q2	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2257000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6453000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4010000000	USD
CY2021Q2	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	8000000	USD
CY2020Q2	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	745000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	8930000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	844000000	USD
CY2021Q2	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	31000000	USD
CY2020Q2	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	0	USD
	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	31000000	USD
CY2020Q2	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	602000000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	2028000000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	1470000000	USD
CY2021Q2	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
CY2020Q2	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-1212000000	USD
	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-632000000	USD
CY2021Q2	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1000000	USD
CY2020Q2	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5000000000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	30000000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5000000000	USD
CY2021Q2	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-28000000	USD
CY2020Q2	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	168000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-32000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	184000000	USD
CY2021Q2	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2083000000	USD
CY2020Q2	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6356000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-13322000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-7936000000	USD
CY2021Q2	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3006000000	USD
CY2020Q2	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	26694000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	9769000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	26694000000	USD
CY2021Q2	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2020Q2	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	109000000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	109000000	USD
CY2021Q2	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	269000000	USD
CY2020Q2	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	236000000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	556000000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	518000000	USD
CY2021Q2	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	36000000	USD
CY2020Q1	us-gaap	Share Price SharePrice	83.90
CY2020Q2	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	151000000	USD
	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	91000000	USD
	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	176000000	USD
CY2021Q2	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3150000000	USD
CY2020Q2	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10529000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	5369000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10529000000	USD
CY2021Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2020Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17290000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17290000000	USD
CY2021Q2	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020Q2	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16990000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16990000000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	7878000000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11161000000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	7878000000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11161000000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	66377000000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	978000000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	35000000	USD
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	150000000	USD
CY2021Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6000000	USD
CY2021Q2	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	76000000	USD
CY2021Q2	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
CY2020Q2	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	18743000000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	18743000000	USD
CY2021Q2	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
CY2020Q2	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	18929000000	USD
	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	18929000000	USD
CY2021Q2	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	76000000	USD
CY2020Q2	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	138000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	294000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	279000000	USD
CY2021Q2	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	6000000	USD
CY2020Q2	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	24000000	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	71000000	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	24000000	USD
CY2021Q2	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
CY2021Q2	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-46000000	USD
CY2020Q2	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	7000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-91000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	2000000	USD
CY2021Q2	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-577000000	USD
CY2020Q2	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	15628000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3297000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	15175000000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1119000000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	10049000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-2585000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	9633000000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6759000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1112000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10463000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1528000000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	67470000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	65344000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1911000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	71000000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	304000000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	9000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	125000000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	294000000	USD
	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	67470000000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	28977000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2000000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	272000000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	14000000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	0	USD
CY2020Q2	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	138000000	USD
CY2020Q2	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
CY2020Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	17216000000	USD
CY2020Q2	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	16990000000	USD
CY2020Q2	tmus	Adjustment To Additional Paid In Capital Purchase Price Consideration AdjustmentToAdditionalPaidInCapitalPurchasePriceConsideration	33533000000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	62996000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	28789000000	USD
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	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	424000000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	15000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	83000000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	279000000	USD
	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	17216000000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	16990000000	USD
	tmus	Adjustment To Additional Paid In Capital Purchase Price Consideration AdjustmentToAdditionalPaidInCapitalPurchasePriceConsideration	33533000000	USD
	tmus	Prior Year Retained Earnings PriorYearRetainedEarnings	67000000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	62996000000	USD
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CY2021Q2	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
	tmus	Numberof Portfolio Segments NumberofPortfolioSegments	2	segment
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CY2021Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	6945000000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	6213000000	USD
	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2021Q2	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	342000000	USD
CY2020Q4	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	325000000	USD
CY2021Q2	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	6603000000	USD
CY2020Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	5888000000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	255000000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	280000000	USD
CY2021Q2	us-gaap	Notes Receivable Net NotesReceivableNet	6348000000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	5608000000	USD
CY2021Q2	us-gaap	Notes Receivable Net NotesReceivableNet	6348000000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	5608000000	USD
CY2021Q2	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	6603000000	USD
CY2020Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	799000000	USD
CY2019Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	460000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	154000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	346000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	251000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	152000000	USD
	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	91000000	USD
	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	10000000	USD
	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	73000000	USD
	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	81000000	USD
CY2021Q2	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	720000000	USD
CY2020Q2	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	674000000	USD
CY2019Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	10766000000	USD
CY2019Q4	us-gaap	Goodwill Gross GoodwillGross	1930000000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	9405000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	11117000000	USD
CY2021Q2	us-gaap	Goodwill Goodwill	11152000000	USD
CY2021Q2	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	10984000000	USD
	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.047
	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	6627000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2027000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	4600000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	6665000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1367000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5298000000	USD
CY2021Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	295000000	USD
CY2020Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	387000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	661000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	411000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Rolling Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths	1095000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Two FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo	903000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Three FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree	746000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Four FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour	588000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive	428000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive	840000000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	4600000000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	580000000	USD
CY2021Q2	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2021Q2	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.041
CY2020Q2	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.049
	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.042
CY2021Q2	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	75500000000	USD
CY2020Q2	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	66100000000	USD
	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	74500000000	USD
	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	48500000000	USD
CY2021Q2	us-gaap	Debt Instrument Repurchased Face Amount DebtInstrumentRepurchasedFaceAmount	660000000	USD
	tmus	Writeoffof Premiums Discountsand Issuance Costs WriteoffofPremiumsDiscountsandIssuanceCosts	0	USD
	tmus	Reimbursement Of Call Penalties ReimbursementOfCallPenalties	0	USD
CY2021Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transaction Next Twelve Months MinimumLeasePaymentsFailedSaleLeasebackTransactionNextTwelveMonths	401000000	USD
CY2021Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Two And Three Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinTwoAndThreeYears	664000000	USD
CY2021Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Four And Five Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinFourAndFiveYears	603000000	USD
CY2021Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Thereafter MinimumLeasePaymentsFailedSaleLeasebackTransactionsThereafter	473000000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	278000000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	824000000	USD
CY2021Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	267000000	USD
CY2021Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	789000000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-11000000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-35000000	USD
CY2021Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	206000000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	204000000	USD
CY2021Q2	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	41000000	USD
CY2020Q2	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	10000000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	724000000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	538000000	USD
CY2021Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	805000000	USD
CY2021Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1400000000	USD
CY2021Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1000000000.0	USD
CY2021Q2	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	1200000000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	1100000000	USD
CY2021Q2	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P24M
CY2021Q2	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	264000000	USD
CY2020Q2	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	205000000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	512000000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	410000000	USD
CY2020Q2	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2021Q2	tmus	Purchase Obligation Due In Rolling After Year Five PurchaseObligationDueInRollingAfterYearFive	1600000000	USD
CY2021Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	978000000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-210000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1911000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	741000000	USD
CY2021Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	320000000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	320000000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	978000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1911000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1247563331	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1236528444	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1245552847	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1047338364	shares
CY2021Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	6154791	shares
CY2020Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	8711617	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9782025	shares
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1253718122	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1236528444	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1254264464	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1057120389	shares
CY2021Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.78
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.17
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.53
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.71
CY2021Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.26
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.30
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.53
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
CY2021Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.78
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.17
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.52
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.70
CY2021Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.26
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.30
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2021Q2	tmus	Purchase Obligation Due In Next Rolling Twelve Months PurchaseObligationDueInNextRollingTwelveMonths	3900000000	USD
CY2021Q2	tmus	Purchase Obligation Due In Rolling Year Two And Three PurchaseObligationDueInRollingYearTwoAndThree	4500000000	USD
CY2021Q2	tmus	Purchase Obligation Due In Rolling Year Four And Five PurchaseObligationDueInRollingYearFourAndFive	2300000000	USD
CY2021Q2	tmus	Lease And Service Credit Commitment Due In Next Rolling Twelve Months LeaseAndServiceCreditCommitmentDueInNextRollingTwelveMonths	339000000	USD
CY2021Q2	tmus	Lease And Service Credit Commitment Due In Rolling Year Two And Three LeaseAndServiceCreditCommitmentDueInRollingYearTwoAndThree	624000000	USD
CY2021Q2	tmus	Lease And Service Credit Commitment Due In Rolling Year Four And Five LeaseAndServiceCreditCommitmentDueInRollingYearFourAndFive	582000000	USD
CY2021Q2	tmus	Lease And Service Credit Commitment Due In Rolling After Year Five LeaseAndServiceCreditCommitmentDueInRollingAfterYearFive	4900000000	USD
CY2021Q2	tmus	Lease And Service Credit Commitment Maximum Remaining Commitment LeaseAndServiceCreditCommitmentMaximumRemainingCommitment	89000000	USD
CY2021Q2	tmus	Merger Commitment Settlement Due In Next Rolling Twelve Months MergerCommitmentSettlementDueInNextRollingTwelveMonths	9000000	USD
CY2021Q2	tmus	Merger Commitment Settlement Due In Rolling Year Two And Three MergerCommitmentSettlementDueInRollingYearTwoAndThree	13000000	USD
CY2021Q2	tmus	Merger Commitment Settlement Due In Rolling Year Four And Five MergerCommitmentSettlementDueInRollingYearFourAndFive	3000000	USD
CY2021Q2	us-gaap	Restructuring Charges RestructuringCharges	48000000	USD
	us-gaap	Restructuring Charges RestructuringCharges	82000000	USD
CY2021Q2	us-gaap	Restructuring And Related Cost Cost Incurred To Date1 RestructuringAndRelatedCostCostIncurredToDate1	1142000000	USD
CY2021Q2	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	261000000	USD
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	384000000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	163000000	USD
	us-gaap	Restructuring Charges RestructuringCharges	82000000	USD
	us-gaap	Payments For Restructuring PaymentsForRestructuring	147000000	USD
	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-20000000	USD
CY2021Q2	us-gaap	Restructuring Reserve RestructuringReserve	78000000	USD
	tmus	Restructuring Term RestructuringTerm	P3Y
CY2021Q2	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	3855000000	USD
CY2020Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	5564000000	USD
CY2021Q2	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1149000000	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1163000000	USD
CY2021Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1589000000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1540000000	USD
CY2021Q2	us-gaap	Interest Payable Current InterestPayableCurrent	769000000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	771000000	USD
CY2021Q2	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	257000000	USD
CY2020Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	399000000	USD
CY2021Q2	tmus	Accrued Liabilities Toll And Interconnect AccruedLiabilitiesTollAndInterconnect	331000000	USD
CY2020Q4	tmus	Accrued Liabilities Toll And Interconnect AccruedLiabilitiesTollAndInterconnect	217000000	USD
CY2021Q2	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	65000000	USD
CY2020Q4	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	135000000	USD
CY2021Q2	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	396000000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	407000000	USD
CY2021Q2	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	8411000000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	10196000000	USD
CY2021Q2	us-gaap	Interest Paid Net InterestPaidNet	913000000	USD
CY2020Q2	us-gaap	Interest Paid Net InterestPaidNet	608000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1858000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	949000000	USD
CY2021Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	1263000000	USD
CY2020Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	1269000000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	2914000000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	2144000000	USD
CY2021Q2	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	63000000	USD
CY2020Q2	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	31000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	85000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	55000000	USD
CY2021Q2	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	1089000000	USD
CY2020Q2	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	1486000000	USD
	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	2470000000	USD
	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	3099000000	USD
CY2021Q2	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	0	USD
CY2020Q2	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	33533000000	USD
	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	0	USD
	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	33533000000	USD
CY2021Q2	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	367000000	USD
CY2020Q2	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	38000000	USD
	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	540000000	USD
	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	339000000	USD
CY2021Q2	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	333000000	USD
CY2020Q2	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1444000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	818000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1753000000	USD
CY2021Q2	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	416000000	USD
CY2020Q2	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	538000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	861000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	597000000	USD
CY2021Q2	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2020Q2	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	38000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	38000000	USD
CY2021Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1043000000	USD
CY2020Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	658000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1954000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1213000000	USD
CY2021Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	377000000	USD
CY2020Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	515000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	486000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	693000000	USD

Files In Submission

Name	View Source	Status
0001283699-21-000150-index-headers.html	Edgar Link	pending
0001283699-21-000150-index.html	Edgar Link	pending
0001283699-21-000150.txt	Edgar Link	pending
0001283699-21-000150-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
ng_tmus06302021ex101.htm	Edgar Link	pending
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tmus-20210630.htm	Edgar Link	pending
tmus-20210630.xsd	Edgar Link	pending
tmus-20210630_cal.xml	Edgar Link	unprocessable
tmus-20210630_def.xml	Edgar Link	unprocessable
tmus-20210630_g1.jpg	Edgar Link	pending
tmus-20210630_htm.xml	Edgar Link	completed
tmus-20210630_lab.xml	Edgar Link	unprocessable
tmus-20210630_pre.xml	Edgar Link	unprocessable

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$TMUS
T-Mobile US, Inc. Stock $tmus

2021 Q2 Form 10-Q Financial Statement

#000128369921000150 Filed on August 03, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TMUS T-Mobile US, Inc. Stock $tmus

2021 Q2 Form 10-Q Financial Statement

#000128369921000150 Filed on August 03, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TMUS
T-Mobile US, Inc. Stock $tmus