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

$tmus Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000128369921000169 Filed on November 02, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue	$20.79B	$19.62B	$19.27B
YoY Change	2.18%	1.83%	74.23%
Cost Of Revenue	$9.328B	$8.247B	$7.602B
YoY Change	2.29%	8.48%	71.33%
Gross Profit	$11.46B	$11.38B	$11.67B
YoY Change	2.09%	-2.51%	76.18%
Gross Profit Margin	55.12%	57.97%	60.55%
Selling, General & Admin	$5.160B	$5.212B	$4.876B
YoY Change	12.05%	6.89%	39.39%
% of Gross Profit	45.04%	45.81%	41.78%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.872B	$4.145B	$4.150B
YoY Change	-8.22%	-0.12%	150.76%
% of Gross Profit	33.8%	36.43%	35.56%
Operating Expenses	$9.032B	$5.212B	$4.876B
YoY Change	2.36%	6.89%	39.39%
Operating Profit	$2.425B	$1.584B	$2.565B
YoY Change	41.65%	-38.25%	74.37%
Interest Expense	-$821.0M	-$836.0M	-$806.0M
YoY Change	3.92%	3.72%	-538.04%
% of Operating Profit	-33.86%	-52.78%	-31.42%
Other Income/Expense, Net	-$13.00M	-$896.0M	-$905.0M
YoY Change	-87.13%	-0.99%	227.9%
Pretax Income	$229.0M	$688.0M	$1.660B
YoY Change	-72.11%	-58.55%	38.91%
Income Tax	-$193.0M	-$3.000M	$407.0M
% Of Pretax Income	-84.28%	-0.44%	24.52%
Net Earnings	$422.0M	$691.0M	$1.253B
YoY Change	-43.73%	-44.85%	44.02%
Net Earnings / Revenue	2.03%	3.52%	6.5%
Basic Earnings Per Share		$0.55	$1.01
Diluted Earnings Per Share	$336.0K	$0.55	$1.00
COMMON SHARES
Basic Shares Outstanding	1.249B shares	1.248B shares	1.238B shares
Diluted Shares Outstanding		1.254B shares	1.250B shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$6.631B	$4.055B	$6.571B
YoY Change	-36.15%	-38.29%	297.52%
Cash & Equivalents	$6.631B	$4.055B	$6.571B
Short-Term Investments
Other Short-Term Assets	$2.005B	$1.576B	$2.889B
YoY Change	-19.67%	-45.45%	66.32%
Inventory	$2.567B	$1.762B	$1.931B
Prepaid Expenses	$746.0M	$943.0M	$659.0M
Receivables	$4.194B	$4.109B	$4.313B
Other Receivables	$4.775B	$4.327B	$3.102B
Total Short-Term Assets	$20.89B	$16.77B	$19.47B
YoY Change	-12.54%	-13.84%	130.14%
LONG-TERM ASSETS
Property, Plant & Equipment	$39.80B	$39.36B	$38.57B
YoY Change	-3.33%	2.04%	74.53%
Goodwill	$12.19B	$12.19B	$10.91B
YoY Change	9.63%	11.75%	465.08%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$3.232B	$3.052B	$2.519B
YoY Change	16.3%	21.16%	40.02%
Total Long-Term Assets	$185.7B	$185.4B	$173.0B
YoY Change	5.33%	7.15%	122.76%
TOTAL ASSETS
Total Short-Term Assets	$20.89B	$16.77B	$19.47B
Total Long-Term Assets	$185.7B	$185.4B	$173.0B
Total Assets	$206.6B	$202.1B	$192.4B
YoY Change	3.2%	5.03%	123.49%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$6.499B	$4.101B	$3.862B
YoY Change	16.8%	6.19%	-39.71%
Accrued Expenses	$8.331B	$7.711B	$8.185B
YoY Change	-1.99%	-5.79%	266.71%
Deferred Revenue	$856.0M	$914.0M	$1.078B
YoY Change	-16.89%	-15.21%	77.3%
Short-Term Debt	$3.378B	$2.096B	$3.713B
YoY Change	-26.23%	-43.55%	681.68%
Long-Term Debt Due	$3.378B	$1.154B	$1.050B
YoY Change	-26.23%	9.9%	3.65%
Total Short-Term Liabilities	$23.50B	$19.25B	$19.84B
YoY Change	8.28%	-2.99%	54.17%
LONG-TERM LIABILITIES
Long-Term Debt	$67.08B	$66.65B	$58.35B
YoY Change	8.48%	14.23%	432.54%
Other Long-Term Liabilities	$5.097B	$5.214B	$3.577B
YoY Change	-5.82%	45.76%	282.16%
Total Long-Term Liabilities	$114.0B	$114.5B	$108.1B
YoY Change	0.75%	5.86%	137.78%
TOTAL LIABILITIES
Total Short-Term Liabilities	$23.50B	$19.25B	$19.84B
Total Long-Term Liabilities	$114.0B	$114.5B	$108.1B
Total Liabilities	$137.5B	$133.7B	$128.0B
YoY Change	1.96%	4.49%	119.34%
SHAREHOLDERS EQUITY
Retained Earnings	-$2.812B	-$3.234B	-$6.586B
YoY Change	-51.82%	-50.9%	-31.28%
Common Stock	$73.29B	$73.15B	$72.71B
YoY Change	0.71%	0.61%	89.17%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$13.00M	$13.00M	$11.00M
YoY Change	18.18%	18.18%	37.5%
Treasury Stock Shares	1.537M shares	1.539M shares	1.545M shares
Shareholders Equity	$69.10B	$68.43B	$64.49B
YoY Change
Total Liabilities & Shareholders Equity	$206.6B	$202.1B	$192.4B
YoY Change	3.2%	5.03%	123.49%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$422.0M	$691.0M	$1.253B
YoY Change	-43.73%	-44.85%	44.02%
Depreciation, Depletion And Amortization	$3.872B	$4.145B	$4.150B
YoY Change	-8.22%	-0.12%	150.76%
Cash From Operating Activities	$3.000B	$3.477B	$2.772B
YoY Change	-13.64%	25.43%	58.58%
INVESTING ACTIVITIES
Capital Expenditures	-$2.958B	$2.944B	$3.217B
YoY Change	-22.3%	-8.49%	112.48%
Acquisitions		$1.886B	$0.00
YoY Change			-100.0%
Other Investing Activities	$1.046B	-$14.00M	$25.00M
YoY Change	553.75%	-156.0%	-2600.0%
Cash From Investing Activities	-$1.912B	-$4.152B	-$1.132B
YoY Change	-47.57%	266.78%	72.3%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00	-$4.000M
YoY Change		-100.0%
Debt Paid & Issued, Net		$4.600B	$5.678B
YoY Change		-18.99%
Cash From Financing Activities	1.472B	-$3.060B	-$6.144B
YoY Change	-63.01%	-50.2%	1031.49%
NET CHANGE
Cash From Operating Activities	3.000B	$3.477B	$2.772B
Cash From Investing Activities	-1.912B	-$4.152B	-$1.132B
Cash From Financing Activities	1.472B	-$3.060B	-$6.144B
Net Change In Cash	2.560B	-$3.735B	-$4.504B
YoY Change	-32.74%	-17.07%	-921.9%
FREE CASH FLOW
Cash From Operating Activities	$3.000B	$3.477B	$2.772B
Capital Expenditures	-$2.958B	$2.944B	$3.217B
Free Cash Flow	$5.958B	$533.0M	-$445.0M
YoY Change	-18.17%	-219.78%	-290.17%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	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	Q3
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P3M
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
	dei	Entity File Number EntityFileNumber	1-33409
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	1249053529	shares
	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	Security Exchange Name SecurityExchangeName	NASDAQ
	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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CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	2496000000	USD
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CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	4254000000	USD
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CY2020Q4	us-gaap	Goodwill Goodwill	11117000000	USD
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CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	4579000000	USD
CY2021Q3	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	2240000000	USD
CY2020Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2021Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	914000000	USD
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CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	21703000000	USD
CY2021Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	66645000000	USD
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	us-gaap	Costs And Expenses CostsAndExpenses	53504000000	USD
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	us-gaap	Operating Income Loss OperatingIncomeLoss	5829000000	USD
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	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2707000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2215000000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	688000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1660000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3122000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2709000000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3000000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	407000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	520000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	715000000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	691000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1253000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2602000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1994000000	USD
CY2021Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	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
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	691000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	1253000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2602000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2314000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	691000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	1253000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2602000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2314000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	12000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	12000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	36000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-261000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	35000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	33000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	103000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-757000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1000000	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	1000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-3000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	4000000	USD
	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	4000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	32000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	37000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	103000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-753000000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	723000000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1290000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2705000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1561000000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.55
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.01
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.09
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.79
CY2021Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q3	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.29
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2021Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.55
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.00
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.07
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.78
CY2021Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q3	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.28
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.06
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1248189719	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1238450665	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1246441464	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1111511964	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1253661245	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1249798740	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1254391787	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1122040528	shares
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	691000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	1253000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2602000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2314000000	USD
CY2021Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4145000000	USD
CY2020Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4150000000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	12511000000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9932000000	USD
CY2021Q3	us-gaap	Share Based Compensation ShareBasedCompensation	131000000	USD
CY2020Q3	us-gaap	Share Based Compensation ShareBasedCompensation	161000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	403000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	558000000	USD
CY2021Q3	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-27000000	USD
CY2020Q3	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	335000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	410000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	743000000	USD
CY2021Q3	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	105000000	USD
CY2020Q3	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	143000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	259000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	489000000	USD
CY2021Q3	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-4000000	USD
CY2020Q3	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	18000000	USD
	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	26000000	USD
	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-37000000	USD
CY2021Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-55000000	USD
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-108000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-184000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-271000000	USD
CY2021Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	418000000	USD
CY2021Q3	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	454000000	USD
CY2020Q3	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1538000000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2197000000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2784000000	USD
CY2021Q3	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	530000000	USD
CY2020Q3	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	306000000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	1825000000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	110000000	USD
CY2021Q3	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-41000000	USD
CY2020Q3	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	549000000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-904000000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1613000000	USD
CY2021Q3	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-1334000000	USD
CY2020Q3	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-1062000000	USD
	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-3730000000	USD
	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-2526000000	USD
CY2021Q3	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	88000000	USD
CY2020Q3	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	8000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	188000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	106000000	USD
CY2021Q3	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	111000000	USD
CY2020Q3	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-964000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1245000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-2630000000	USD
CY2021Q3	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2046000000	USD
CY2020Q3	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-1145000000	USD
	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-4411000000	USD
	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2947000000	USD
CY2021Q3	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-87000000	USD
CY2020Q3	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-51000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-351000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2162000000	USD
CY2021Q3	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	92000000	USD
CY2020Q3	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	139000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	157000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	230000000	USD
CY2021Q3	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3477000000	USD
CY2020Q3	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2772000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	10917000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5166000000	USD
CY2021Q3	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	46000000	USD
CY2020Q3	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	108000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	187000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	339000000	USD
CY2021Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2944000000	USD
CY2020Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3217000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9397000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7227000000	USD
CY2021Q3	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	407000000	USD
CY2020Q3	us-gaap	Proceeds From Sale Of Intangible Assets ProceedsFromSaleOfIntangibleAssets	17000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	9337000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	827000000	USD
CY2021Q3	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	0	USD
CY2020Q3	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	0	USD
	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	31000000	USD
	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	0	USD
CY2021Q3	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	1071000000	USD
CY2020Q3	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	855000000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	3099000000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	2325000000	USD
CY2021Q3	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
CY2020Q3	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	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
CY2021Q3	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1886000000	USD
CY2020Q3	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1916000000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5000000000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
CY2021Q3	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
CY2020Q3	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	1238000000	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	1238000000	USD
CY2021Q3	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-14000000	USD
CY2020Q3	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	25000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-46000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	209000000	USD
CY2021Q3	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4152000000	USD
CY2020Q3	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1132000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-17474000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-9068000000	USD
CY2021Q3	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1989000000	USD
CY2020Q3	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	11758000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	26694000000	USD
CY2021Q3	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	14000000	USD
CY2020Q3	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	72000000	USD
CY2021Q3	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2020Q3	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	109000000	USD
CY2021Q3	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	266000000	USD
CY2020Q3	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	246000000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	822000000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	764000000	USD
CY2021Q3	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	76000000	USD
CY2020Q3	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	231000000	USD
	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	167000000	USD
	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	407000000	USD
CY2021Q3	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	4600000000	USD
CY2020Q3	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	5678000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	9969000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	16207000000	USD
CY2021Q3	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2020Q3	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2550000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	19840000000	USD
CY2021Q3	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020Q3	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2546000000	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	19536000000	USD
CY2021Q3	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
CY2020Q3	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	18743000000	USD
CY2021Q3	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
CY2020Q3	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	18929000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	308000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	351000000	USD
CY2021Q3	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	45000000	USD
CY2020Q3	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	58000000	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	116000000	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	82000000	USD
CY2021Q3	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-48000000	USD
CY2020Q3	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	137000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-139000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	139000000	USD
CY2021Q3	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3060000000	USD
CY2020Q3	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-6144000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	237000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	9031000000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3735000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4504000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-6320000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	5129000000	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
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
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4143000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6657000000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4143000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6657000000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	67470000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	691000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	32000000	USD
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	147000000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1000000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	100000000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	27000000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	65000000	USD
CY2020Q3	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	72000000	USD
CY2020Q3	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
CY2020Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2550000000	USD
CY2020Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2546000000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	64487000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	28789000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2314000000	USD
CY2021Q3	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	14000000	USD
CY2021Q3	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	68427000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	65344000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2602000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	103000000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	451000000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	10000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	225000000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	308000000	USD
	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	68427000000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	62996000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	1253000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	37000000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	177000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-753000000	USD
	tmus	Adjustments To Additional Paid In Capital Executive Put Option AdjustmentsToAdditionalPaidInCapitalExecutivePutOption	1000000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	601000000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	42000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	148000000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	351000000	USD
	tmus	Stock Issued During Period Value Transfers With Ndqc Plan StockIssuedDuringPeriodValueTransfersWithNDQCPlan	0	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	19766000000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	19536000000	USD
	tmus	Adjustment To Additional Paid In Capital Purchase Price Consideration AdjustmentToAdditionalPaidInCapitalPurchasePriceConsideration	33533000000	USD
	tmus	Prior Year Retained Earnings PriorYearRetainedEarnings	67000000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	64487000000	USD
	us-gaap	Use Of Estimates UseOfEstimates	Estimates are based on historical experience, where applicable, and other assumptions that management believes are reasonable under the circumstances, including but not limited to, the valuation of assets acquired and liabilities assumed through the merger (the “Merger”) with Sprint Corporation (“Sprint”) and through our acquisitions of affiliates. These estimates are inherently subject to judgment and actual results could differ from those estimates.
CY2021Q3	tmus	Merger Commitment Settlement Due In Rolling Year Four And Five MergerCommitmentSettlementDueInRollingYearFourAndFive	1000000	USD
CY2020Q2	us-gaap	Share Price SharePrice	83.90
	tmus	Numberof Portfolio Segments NumberofPortfolioSegments	2	segment
	tmus	Numberof Customer Classes NumberofCustomerClasses	2	class
CY2021Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	7164000000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	6213000000	USD
CY2021Q3	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	330000000	USD
CY2020Q4	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	325000000	USD
CY2021Q3	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	6834000000	USD
CY2020Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	5888000000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	248000000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	280000000	USD
CY2021Q3	us-gaap	Notes Receivable Net NotesReceivableNet	6586000000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	5608000000	USD
CY2021Q3	us-gaap	Notes Receivable Net NotesReceivableNet	6586000000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	5608000000	USD
CY2021Q3	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	6834000000	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	259000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	489000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	356000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	244000000	USD
	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	109000000	USD
	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	60000000	USD
	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	104000000	USD
	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	111000000	USD
CY2021Q3	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	707000000	USD
CY2020Q3	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	745000000	USD
	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	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
CY2021Q3	us-gaap	Goodwill Goodwill	12188000000	USD
CY2021Q3	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	10984000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	7391000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2344000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5047000000	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
CY2021Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	316000000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	383000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	977000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	794000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Rolling Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths	1128000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Two FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo	956000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Three FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree	799000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Four FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour	641000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive	480000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive	1043000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5047000000	USD
	tmus	Reimbursement Of Call Penalties ReimbursementOfCallPenalties	0	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2020Q1	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	580000000	USD
CY2021Q3	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.040
CY2020Q3	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.045
	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.041
	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.047
CY2021Q3	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	74500000000	USD
CY2020Q3	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	69600000000	USD
	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	74400000000	USD
	tmus	Debt Instrument Average Amount Outstanding During Period DebtInstrumentAverageAmountOutstandingDuringPeriod	54500000000	USD
CY2021Q3	us-gaap	Debt Instrument Repurchased Face Amount DebtInstrumentRepurchasedFaceAmount	1086000000	USD
	tmus	Writeoffof Premiums Discountsand Issuance Costs WriteoffofPremiumsDiscountsandIssuanceCosts	0	USD
	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2021Q3	tmus	Minimum Lease Payments Failed Sale Leaseback Transaction Next Twelve Months MinimumLeasePaymentsFailedSaleLeasebackTransactionNextTwelveMonths	404000000	USD
CY2021Q3	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Two And Three Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinTwoAndThreeYears	638000000	USD
CY2021Q3	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Four And Five Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinFourAndFiveYears	605000000	USD
CY2021Q3	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Thereafter MinimumLeasePaymentsFailedSaleLeasebackTransactionsThereafter	397000000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	278000000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	824000000	USD
CY2021Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	262000000	USD
CY2021Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	792000000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-16000000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-32000000	USD
CY2021Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	201000000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	204000000	USD
CY2021Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	29000000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	5000000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	753000000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	543000000	USD
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	386000000	USD
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1400000000	USD
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1000000000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	1300000000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	1100000000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P24M
CY2021Q3	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	277000000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	221000000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	789000000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	631000000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3000000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	407000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	520000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	715000000	USD
CY2021Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.003
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.245
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.167
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.264
CY2021Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	691000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1253000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	2602000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1994000000	USD
CY2021Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	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
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	691000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	1253000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2602000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	2314000000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1248189719	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1238450665	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1246441464	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1111511964	shares
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5471526	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	11348075	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	7950323	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	10528564	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1253661245	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1249798740	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1254391787	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1122040528	shares
CY2021Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.55
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.01
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.09
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.79
CY2021Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q3	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.29
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2021Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.55
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.00
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.07
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.78
CY2021Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q3	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.28
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.06
	tmus	Operating Lease Advance Payments OperatingLeaseAdvancePayments	1000000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	3655000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	1196000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	4282000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	846000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	3892000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	555000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	3401000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	150000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	2949000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due In Rolling Year Five FinanceLeaseLiabilityPaymentsDueInRollingYearFive	48000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	17817000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due In Rolling After Year Five FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive	37000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	35996000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2832000000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	6640000000	USD
CY2021Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	91000000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	29356000000	USD
CY2021Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	2741000000	USD
CY2021Q3	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	15000000	USD
CY2020Q3	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	19000000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	51000000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	59000000	USD
CY2021Q3	tmus	Lessee Operating Lease Lease Notyet Commenced Payments Due LesseeOperatingLeaseLeaseNotyetCommencedPaymentsDue	227000000	USD
CY2021Q3	tmus	Purchase Obligation Due In Next Rolling Twelve Months PurchaseObligationDueInNextRollingTwelveMonths	4500000000	USD
CY2021Q3	tmus	Purchase Obligation Due In Rolling Year Two And Three PurchaseObligationDueInRollingYearTwoAndThree	5600000000	USD
CY2021Q3	tmus	Purchase Obligation Due In Rolling Year Four And Five PurchaseObligationDueInRollingYearFourAndFive	2200000000	USD
CY2021Q3	tmus	Purchase Obligation Due In Rolling After Year Five PurchaseObligationDueInRollingAfterYearFive	1700000000	USD
CY2021Q3	tmus	Lease And Service Credit Commitment Due In Next Rolling Twelve Months LeaseAndServiceCreditCommitmentDueInNextRollingTwelveMonths	360000000	USD
CY2021Q3	tmus	Lease And Service Credit Commitment Due In Rolling Year Two And Three LeaseAndServiceCreditCommitmentDueInRollingYearTwoAndThree	617000000	USD
CY2021Q3	tmus	Lease And Service Credit Commitment Due In Rolling Year Four And Five LeaseAndServiceCreditCommitmentDueInRollingYearFourAndFive	591000000	USD
CY2021Q3	tmus	Lease And Service Credit Commitment Due In Rolling After Year Five LeaseAndServiceCreditCommitmentDueInRollingAfterYearFive	4800000000	USD
CY2021Q3	tmus	Lease And Service Credit Commitment Maximum Remaining Commitment LeaseAndServiceCreditCommitmentMaximumRemainingCommitment	87000000	USD
CY2021Q3	tmus	Merger Commitment Settlement Due In Next Rolling Twelve Months MergerCommitmentSettlementDueInNextRollingTwelveMonths	9000000	USD
CY2021Q3	tmus	Merger Commitment Settlement Due In Rolling Year Two And Three MergerCommitmentSettlementDueInRollingYearTwoAndThree	13000000	USD
CY2021Q3	us-gaap	Restructuring Charges RestructuringCharges	38000000	USD
	us-gaap	Restructuring Charges RestructuringCharges	120000000	USD
CY2021Q3	us-gaap	Restructuring And Related Cost Cost Incurred To Date1 RestructuringAndRelatedCostCostIncurredToDate1	1180000000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	265000000	USD
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	649000000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	163000000	USD
	us-gaap	Restructuring Charges RestructuringCharges	120000000	USD
	us-gaap	Payments For Restructuring PaymentsForRestructuring	224000000	USD
	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-20000000	USD
CY2021Q3	us-gaap	Restructuring Reserve RestructuringReserve	39000000	USD
	tmus	Restructuring Term RestructuringTerm	P3Y
CY2021Q3	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	4101000000	USD
CY2020Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	5564000000	USD
CY2021Q3	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1205000000	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1163000000	USD
CY2021Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1606000000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1540000000	USD
CY2021Q3	us-gaap	Interest Payable Current InterestPayableCurrent	824000000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	771000000	USD
CY2021Q3	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	278000000	USD
CY2020Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	399000000	USD
CY2021Q3	tmus	Accrued Liabilities Toll And Interconnect AccruedLiabilitiesTollAndInterconnect	229000000	USD
CY2020Q4	tmus	Accrued Liabilities Toll And Interconnect AccruedLiabilitiesTollAndInterconnect	217000000	USD
CY2021Q3	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	64000000	USD
CY2020Q4	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	135000000	USD
CY2021Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	428000000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	407000000	USD
CY2021Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	8735000000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	10196000000	USD
CY2021Q3	us-gaap	Interest Paid Net InterestPaidNet	884000000	USD
CY2020Q3	us-gaap	Interest Paid Net InterestPaidNet	940000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	2742000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1889000000	USD
CY2021Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	2251000000	USD
CY2020Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	1349000000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	5165000000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	3493000000	USD
CY2021Q3	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	38000000	USD
CY2020Q3	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	63000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	123000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	118000000	USD
CY2021Q3	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	891000000	USD
CY2020Q3	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	1535000000	USD
	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	3361000000	USD
	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	4634000000	USD
CY2021Q3	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	0	USD
CY2020Q3	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	0	USD
	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	0	USD
	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	33533000000	USD
CY2021Q3	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	-113000000	USD
CY2020Q3	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	216000000	USD
	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	427000000	USD
	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	555000000	USD
CY2021Q3	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	214000000	USD
CY2020Q3	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	599000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1032000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	2352000000	USD
CY2021Q3	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	309000000	USD
CY2020Q3	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	433000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	1170000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	1030000000	USD
CY2021Q3	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2020Q3	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	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
CY2021Q3	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	985000000	USD
CY2020Q3	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	11833000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2939000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13046000000	USD
CY2021Q3	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	623000000	USD
CY2020Q3	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	219000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1109000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	912000000	USD

Files In Submission

Name	View Source	Status
0001283699-21-000169-index-headers.html	Edgar Link	pending
0001283699-21-000169-index.html	Edgar Link	pending
0001283699-21-000169.txt	Edgar Link	pending
0001283699-21-000169-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
ng_tmus09302021ex101.htm	Edgar Link	pending
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report.css	Edgar Link	pending
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tmus-20210930.htm	Edgar Link	pending
tmus-20210930.xsd	Edgar Link	pending
tmus-20210930_cal.xml	Edgar Link	unprocessable
tmus-20210930_def.xml	Edgar Link	unprocessable
tmus-20210930_g1.jpg	Edgar Link	pending
tmus-20210930_htm.xml	Edgar Link	completed
tmus-20210930_lab.xml	Edgar Link	unprocessable
tmus-20210930_pre.xml	Edgar Link	unprocessable

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

2021 Q4 Form 10-Q Financial Statement

#000128369921000169 Filed on November 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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

2021 Q4 Form 10-Q Financial Statement

#000128369921000169 Filed on November 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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