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

$tmus Overview Financials Valuation SEC Filings Company Website

2020 Q2 Form 10-Q Financial Statement

#000128369920000165 Filed on August 06, 2020

Income Statement

Concept	2020 Q2	2019 Q2	2019 Q1
Revenue	$17.67B	$10.98B	$11.08B
YoY Change	60.95%	3.86%	5.98%
Cost Of Revenue	$6.725B	$4.310B	$4.562B
YoY Change	56.03%	181.7%	187.1%
Gross Profit	$10.95B	$6.669B	$6.518B
YoY Change	64.13%	-26.24%	-26.48%
Gross Profit Margin	61.94%	60.74%	58.83%
Selling, General & Admin	$5.604B	$3.543B	$3.442B
YoY Change	58.17%	11.24%	8.79%
% of Gross Profit	51.2%	53.13%	52.81%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$4.064B	$1.585B	$1.600B
YoY Change	156.4%	-3.0%	1.59%
% of Gross Profit	37.13%	23.77%	24.55%
Operating Expenses	$5.604B	$3.543B	$3.442B
YoY Change	58.17%	11.24%	8.79%
Operating Profit	$820.0M	$1.541B	$1.476B
YoY Change	-46.79%	6.28%	15.13%
Interest Expense	-$833.0M	$182.0M	$179.0M
YoY Change	-557.69%	-7.14%	-28.69%
% of Operating Profit	-101.59%	11.81%	12.13%
Other Income/Expense, Net	-$1.028B	-$301.0M	-$273.0M
YoY Change	241.53%	-21.2%	-31.92%
Pretax Income	-$208.0M	$1.240B	$1.203B
YoY Change	-116.77%	16.1%	36.55%
Income Tax	$2.000M	$301.0M	$295.0M
% Of Pretax Income		24.27%	24.52%
Net Earnings	$110.0M	$939.0M	$908.0M
YoY Change	-88.29%	20.08%	35.32%
Net Earnings / Revenue	0.62%	8.55%	8.19%
Basic Earnings Per Share	$0.09	$1.10	$1.07
Diluted Earnings Per Share	$0.09	$1.09	$1.06
COMMON SHARES
Basic Shares Outstanding	1.237B shares	854.4M shares	851.2M shares
Diluted Shares Outstanding	1.237B shares	860.1M shares	858.6M shares

Balance Sheet

Concept	2020 Q2	2019 Q2	2019 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$11.08B	$1.105B	$1.439B
YoY Change	902.35%	413.95%	-43.06%
Cash & Equivalents	$11.08B	$1.105B	$1.439B
Short-Term Investments
Other Short-Term Assets	$2.586B	$1.730B	$1.598B
YoY Change	49.48%	-10.32%	-21.78%
Inventory	$1.549B	$998.0M	$1.261B
Prepaid Expenses	$627.0M
Receivables	$3.355B	$1.817B	$1.749B
Other Receivables	$3.218B	$2.464B	$2.482B
Total Short-Term Assets	$24.32B	$8.114B	$8.745B
YoY Change	199.74%	14.43%	-8.99%
LONG-TERM ASSETS
Property, Plant & Equipment	$38.80B	$21.85B	$21.02B
YoY Change	77.6%	-2.36%	-5.77%
Goodwill	$10.91B	$1.901B	$1.901B
YoY Change	473.91%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$2.326B	$1.707B	$1.552B
YoY Change	36.26%	30.21%	46.14%
Total Long-Term Assets	$162.9B	$76.67B	$74.33B
YoY Change	112.43%	22.48%	19.12%
TOTAL ASSETS
Total Short-Term Assets	$24.32B	$8.114B	$8.745B
Total Long-Term Assets	$162.9B	$76.67B	$74.33B
Total Assets	$187.2B	$84.79B	$83.07B
YoY Change	120.78%	21.66%	15.37%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$9.348B	$7.260B	$7.330B
YoY Change	28.76%	8.59%	2.42%
Accrued Expenses	$4.164B	$2.268B	$2.202B
YoY Change	83.6%
Deferred Revenue	$1.185B	$620.0M	$665.0M
YoY Change	91.13%	-14.13%	-15.07%
Short-Term Debt	$3.818B	$300.0M	$848.0M
YoY Change	1172.67%	-77.34%	-77.48%
Long-Term Debt Due	$1.040B	$963.0M	$911.0M
YoY Change	8.0%
Total Short-Term Liabilities	$23.19B	$13.17B	$13.33B
YoY Change	76.05%	41.94%	7.85%
LONG-TERM LIABILITIES
Long-Term Debt	$62.78B	$10.95B	$10.95B
YoY Change	473.15%	-9.21%	-9.69%
Other Long-Term Liabilities	$3.494B	$913.0M	$903.0M
YoY Change	282.69%	-5.68%	-3.22%
Total Long-Term Liabilities	$101.0B	$44.65B	$43.57B
YoY Change	126.24%	20.6%	18.48%
TOTAL LIABILITIES
Total Short-Term Liabilities	$23.19B	$13.17B	$13.33B
Total Long-Term Liabilities	$101.0B	$44.65B	$43.57B
Total Liabilities	$124.2B	$57.82B	$56.89B
YoY Change	114.81%	24.88%	15.8%
SHAREHOLDERS EQUITY
Retained Earnings	-$7.839B	-$10.45B	-$12.30B
YoY Change	-25.01%	-27.35%	-22.44%
Common Stock	$72.51B	$38.24B	$38.10B
YoY Change	89.6%	1.21%	0.11%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$12.00M	$8.000M	$5.000M
YoY Change	50.0%	14.29%	-28.57%
Treasury Stock Shares	1.549M shares	1.518M shares	1.479M shares
Shareholders Equity	$63.00B	$26.97B	$26.18B
YoY Change
Total Liabilities & Shareholders Equity	$187.2B	$84.79B	$83.07B
YoY Change	120.78%	21.66%	15.37%

Cashflow Statement

Concept	2020 Q2	2019 Q2	2019 Q1
OPERATING ACTIVITIES
Net Income	$110.0M	$939.0M	$908.0M
YoY Change	-88.29%	20.08%	35.32%
Depreciation, Depletion And Amortization	$4.064B	$1.585B	$1.600B
YoY Change	156.4%	-3.0%	1.59%
Cash From Operating Activities	$777.0M	$2.147B	$1.392B
YoY Change	-63.81%	70.26%	80.78%
INVESTING ACTIVITIES
Capital Expenditures	$2.257B	$1.789B	$1.931B
YoY Change	26.16%	9.82%	41.36%
Acquisitions	$5.000B	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Other Investing Activities	$168.0M	$0.00	$7.000M
YoY Change		-100.0%	0.0%
Cash From Investing Activities	-$6.356B	-$1.615B	-$966.0M
YoY Change	293.56%	427.78%	109.09%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	-$300.0M	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Debt Paid & Issued, Net	$10.53B	$600.0M	$0.00
YoY Change	1654.83%	-74.47%	-100.0%
Cash From Financing Activities	$15.63B	-$866.0M	-$190.0M
YoY Change	-1904.62%	-73.49%	-119.0%
NET CHANGE
Cash From Operating Activities	$777.0M	$2.147B	$1.392B
Cash From Investing Activities	-$6.356B	-$1.615B	-$966.0M
Cash From Financing Activities	$15.63B	-$866.0M	-$190.0M
Net Change In Cash	$10.05B	-$334.0M	$236.0M
YoY Change	-3108.68%	-85.55%	-81.96%
FREE CASH FLOW
Cash From Operating Activities	$777.0M	$2.147B	$1.392B
Capital Expenditures	$2.257B	$1.789B	$1.931B
Free Cash Flow	-$1.480B	$358.0M	-$539.0M
YoY Change	-513.41%	-197.28%	-9.56%

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	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
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CY2020Q2	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020Q2	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	2020-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-33409
	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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	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-15000000	USD
CY2020Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1028000000	USD
CY2019Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-301000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1310000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-574000000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-208000000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1240000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1049000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2443000000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2000000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	308000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	596000000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-210000000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	939000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	741000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1847000000	USD
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	320000000	USD
CY2019Q2	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	939000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1847000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	939000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1847000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	3000000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-102000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-273000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-168000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	2000000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-292000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-790000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-481000000	USD
CY2020Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	112000000	USD
CY2019Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	647000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	271000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1366000000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.17
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.10
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.71
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.16
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.26
CY2019Q2	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.16
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.17
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.09
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.70
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.14
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.26
CY2019Q2	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.14
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1236528444	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	854368443	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1047338364	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	852796369	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1236528444	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	860135593	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1057120389	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	860890870	shares
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	939000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1847000000	USD
CY2020Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4064000000	USD
CY2019Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1585000000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5782000000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3185000000	USD
CY2020Q2	us-gaap	Share Based Compensation ShareBasedCompensation	259000000	USD
CY2019Q2	us-gaap	Share Based Compensation ShareBasedCompensation	130000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	397000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	240000000	USD
CY2020Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	98000000	USD
CY2019Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	267000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	408000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	555000000	USD
CY2020Q2	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	233000000	USD
CY2019Q2	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	71000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	346000000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	144000000	USD
CY2020Q2	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-30000000	USD
CY2019Q2	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-28000000	USD
	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-55000000	USD
	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-63000000	USD
CY2020Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-163000000	USD
CY2019Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-19000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-163000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-19000000	USD
CY2020Q2	us-gaap	Asset Impairment Charges AssetImpairmentCharges	418000000	USD
CY2019Q2	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	418000000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020Q2	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	498000000	USD
CY2019Q2	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	805000000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1246000000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1948000000	USD
CY2020Q2	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	-127000000	USD
CY2019Q2	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	150000000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	-196000000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	400000000	USD
CY2020Q2	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	553000000	USD
CY2019Q2	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-162000000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1064000000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	103000000	USD
CY2020Q2	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-937000000	USD
CY2019Q2	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-469000000	USD
	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-1464000000	USD
	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-904000000	USD
CY2020Q2	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	104000000	USD
CY2019Q2	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	83000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	98000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	170000000	USD
CY2020Q2	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1261000000	USD
CY2019Q2	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	43000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1666000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	56000000	USD
CY2020Q2	tmus	Increase Decreasein Operating Lease Liability IncreaseDecreaseinOperatingLeaseLiability	-1077000000	USD
CY2019Q2	tmus	Increase Decreasein Operating Lease Liability IncreaseDecreaseinOperatingLeaseLiability	-521000000	USD
	tmus	Increase Decreasein Operating Lease Liability IncreaseDecreaseinOperatingLeaseLiability	-1802000000	USD
	tmus	Increase Decreasein Operating Lease Liability IncreaseDecreaseinOperatingLeaseLiability	-1043000000	USD
CY2020Q2	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2190000000	USD
CY2019Q2	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-27000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2111000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	94000000	USD
CY2020Q2	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	21000000	USD
CY2019Q2	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	20000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	91000000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	96000000	USD
CY2020Q2	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	777000000	USD
CY2019Q2	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2147000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2394000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3539000000	USD
CY2020Q2	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	119000000	USD
CY2019Q2	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	125000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	231000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	243000000	USD
CY2020Q2	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2257000000	USD
CY2019Q2	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1789000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4010000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3720000000	USD
CY2020Q2	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	745000000	USD
CY2019Q2	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	665000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	844000000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	850000000	USD
CY2020Q2	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	602000000	USD
CY2019Q2	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	839000000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	1470000000	USD
	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	1996000000	USD
CY2020Q2	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-1212000000	USD
CY2019Q2	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-632000000	USD
	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
CY2020Q2	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5000000000	USD
CY2019Q2	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5000000000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020Q2	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	168000000	USD
CY2019Q2	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	184000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	7000000	USD
CY2020Q2	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6356000000	USD
CY2019Q2	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1615000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-7936000000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	109000000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2020Q2	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2581000000	USD
CY2020Q2	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	26694000000	USD
CY2019Q2	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	26694000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020Q2	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	109000000	USD
CY2019Q2	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2019Q2	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	880000000	USD
	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	0	USD
	us-gaap	Proceeds From Secured Lines Of Credit ProceedsFromSecuredLinesOfCredit	1765000000	USD
CY2020Q2	tmus	Repayments Of Revolving Credit Facility RepaymentsOfRevolvingCreditFacility	0	USD
CY2019Q2	tmus	Repayments Of Revolving Credit Facility RepaymentsOfRevolvingCreditFacility	880000000	USD
	tmus	Repayments Of Revolving Credit Facility RepaymentsOfRevolvingCreditFacility	0	USD
	tmus	Repayments Of Revolving Credit Facility RepaymentsOfRevolvingCreditFacility	1765000000	USD
CY2020Q2	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	236000000	USD
CY2019Q2	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	229000000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	518000000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	315000000	USD
CY2020Q2	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	151000000	USD
CY2019Q2	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	0	USD
	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	176000000	USD
	tmus	Repayments Of Short Term Debt For Purchases Of Inventory Property And Equipment Net RepaymentsOfShortTermDebtForPurchasesOfInventoryPropertyAndEquipmentNet	0	USD
CY2020Q2	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10529000000	USD
CY2019Q2	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	600000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10529000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	600000000	USD
CY2020Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17290000000	USD
CY2019Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	17290000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2020Q2	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16990000000	USD
CY2019Q2	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16990000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16990000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020Q2	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	18743000000	USD
CY2019Q2	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	18743000000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
CY2020Q2	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	18929000000	USD
CY2019Q2	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	18929000000	USD
	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
CY2020Q2	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	138000000	USD
CY2019Q2	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	279000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	104000000	USD
CY2020Q2	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	24000000	USD
CY2019Q2	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	28000000	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	24000000	USD
	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	28000000	USD
CY2020Q2	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	7000000	USD
CY2019Q2	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	2000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-9000000	USD
CY2020Q2	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	15628000000	USD
CY2019Q2	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-866000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	15175000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1056000000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	10049000000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-334000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	9633000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-98000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1112000000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1439000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1528000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1203000000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11161000000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1105000000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11161000000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1105000000	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	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	138000000	USD
CY2020Q2	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	173564426	shares
	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
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	62996000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	28789000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-790000000	USD
	tmus	Adjustments To Additional Paid In Capital Executive Put Option AdjustmentsToAdditionalPaidInCapitalExecutivePutOption	1000000	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
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	17216000000	USD
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	173564426	shares
	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
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	26181000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	939000000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-292000000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	143000000	USD
CY2019Q2	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4000000	USD
CY2019Q2	tmus	Stock Issued During Period Shares Distribution From Ndqc Plan StockIssuedDuringPeriodSharesDistributionFromNDQCPlan	-39360	shares
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	26967000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	24718000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1847000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-481000000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	264000000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1000000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	69000000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	104000000	USD
	tmus	Prior Year Retained Earnings PriorYearRetainedEarnings	653000000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	26967000000	USD
	us-gaap	Use Of Estimates UseOfEstimates	Estimates are based on historical experience, where applicable, and other assumptions which our management believes are reasonable under the circumstances, including but not limited to the valuation of assets acquired and liabilities assumed through the Merger with Sprint and the potential impacts arising from the COVID-19 pandemic. These estimates are inherently subject to judgment and actual results could differ from those estimates.
	tmus	Device Upgrade Period DeviceUpgradePeriod	P18M
CY2020Q2	tmus	Receivable With Imputed Interest Discount And Allowances Percentage Of Gross Accounts Receivable ReceivableWithImputedInterestDiscountAndAllowancesPercentageOfGrossAccountsReceivable	0.078
CY2019Q4	tmus	Receivable With Imputed Interest Discount And Allowances Percentage Of Gross Accounts Receivable ReceivableWithImputedInterestDiscountAndAllowancesPercentageOfGrossAccountsReceivable	0.070
CY2020Q1	us-gaap	Share Price SharePrice	83.90
	tmus	Numberof Portfolio Segments NumberofPortfolioSegments	2	segment
	tmus	Numberof Customer Classes NumberofCustomerClasses	2	class
CY2020Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	5084000000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4582000000	USD
CY2020Q2	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	229000000	USD
CY2019Q4	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	299000000	USD
CY2020Q2	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	4855000000	USD
CY2019Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	4283000000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	262000000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	100000000	USD
CY2020Q2	us-gaap	Notes Receivable Net NotesReceivableNet	4593000000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4183000000	USD
CY2020Q2	us-gaap	Notes Receivable Net NotesReceivableNet	4593000000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4183000000	USD
CY2020Q2	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	4855000000	USD
CY2019Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	460000000	USD
CY2018Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	516000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	346000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	144000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	152000000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	164000000	USD
	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	10000000	USD
	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	89000000	USD
	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	81000000	USD
	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	84000000	USD
CY2020Q2	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	674000000	USD
CY2019Q2	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	501000000	USD
CY2020Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	37089000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33118000000	USD
CY2020Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	38801000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	21984000000	USD
CY2020Q2	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	119000000	USD
CY2019Q2	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	125000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	231000000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	243000000	USD
CY2020Q2	us-gaap	Depreciation Depreciation	3700000000	USD
CY2019Q2	us-gaap	Depreciation Depreciation	1600000000	USD
	us-gaap	Depreciation Depreciation	5400000000	USD
	us-gaap	Depreciation Depreciation	3100000000	USD
CY2020Q2	tmus	Depreciation Expensefor Leased Wireless Devices DepreciationExpenseforLeasedWirelessDevices	947000000	USD
CY2019Q2	tmus	Depreciation Expensefor Leased Wireless Devices DepreciationExpenseforLeasedWirelessDevices	125000000	USD
	tmus	Depreciation Expensefor Leased Wireless Devices DepreciationExpenseforLeasedWirelessDevices	1100000000	USD
	tmus	Depreciation Expensefor Leased Wireless Devices DepreciationExpenseforLeasedWirelessDevices	309000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	659000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	609000000	USD
	tmus	Asset Retirement Obligation Liabilities Assumed In Business Combination AssetRetirementObligationLiabilitiesAssumedInBusinessCombination	1062000000	USD
CY2019	tmus	Asset Retirement Obligation Liabilities Assumed In Business Combination AssetRetirementObligationLiabilitiesAssumedInBusinessCombination	0	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	6000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	35000000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	0	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2000000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	22000000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	32000000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-15000000	USD
CY2020Q2	us-gaap	Asset Retirement Obligation AssetRetirementObligation	1749000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	659000000	USD
CY2020Q2	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	1100000000	USD
CY2019Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	159000000	USD
	us-gaap	Capitalized Computer Software Impairments1 CapitalizedComputerSoftwareImpairments1	200000000	USD
CY2020Q2	us-gaap	Capitalized Computer Software Impairments1 CapitalizedComputerSoftwareImpairments1	200000000	USD
	us-gaap	Capitalized Computer Software Impairments1 CapitalizedComputerSoftwareImpairments1	0	USD
CY2019Q2	us-gaap	Capitalized Computer Software Impairments1 CapitalizedComputerSoftwareImpairments1	0	USD
CY2019Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	10766000000	USD
CY2019Q4	us-gaap	Goodwill Gross GoodwillGross	1901000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1930000000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	218000000	USD
CY2020Q2	us-gaap	Goodwill Goodwill	10910000000	USD
CY2020Q2	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	10984000000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	218000000	USD
CY2020Q2	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	218000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	7861000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1823000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	6038000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1527000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1412000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	115000000	USD
CY2020Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	387000000	USD
CY2019Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	411000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	35000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Rolling Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths	1406000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Two FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo	1096000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Three FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree	904000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Four FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour	749000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive	590000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive	1293000000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	6038000000	USD
CY2019Q4	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-580000000	USD
CY2020Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1700000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-868000000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	39000000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	39000000	USD
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	182000000	USD
CY2020Q2	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	51000000	USD
CY2019Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	62000000	USD
CY2020Q2	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	46000000000	USD
CY2020Q2	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	567000000	USD
	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	45433000000	USD
CY2020Q2	us-gaap	Debt Instrument Repurchased Face Amount DebtInstrumentRepurchasedFaceAmount	2704000000	USD
	tmus	Writeoffof Premiums Discountsand Issuance Costs WriteoffofPremiumsDiscountsandIssuanceCosts	0	USD
	tmus	Reimbursement Of Commitment Letter Fees ReimbursementOfCommitmentLetterFees	0	USD
CY2020Q2	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	631000000	USD
CY2019Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	113000000	USD
CY2020Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transaction Next Twelve Months MinimumLeasePaymentsFailedSaleLeasebackTransactionNextTwelveMonths	391000000	USD
CY2020Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Two And Three Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinTwoAndThreeYears	763000000	USD
CY2020Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Four And Five Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinFourAndFiveYears	588000000	USD
CY2020Q2	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Thereafter MinimumLeasePaymentsFailedSaleLeasebackTransactionsThereafter	768000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	63000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	560000000	USD
CY2020Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	197000000	USD
CY2020Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	845000000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	134000000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	285000000	USD
CY2020Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	168000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	50000000	USD
CY2020Q2	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	10000000	USD
CY2019Q2	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	43000000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	538000000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	603000000	USD
CY2020Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	696000000	USD
CY2020Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1000000000.0	USD
CY2020Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	921000000	USD
CY2020Q2	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	939000000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	906000000	USD
CY2020Q2	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P24M
CY2020Q2	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	205000000	USD
CY2019Q2	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	137000000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	410000000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	253000000	USD
CY2020Q2	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2019Q2	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2020Q2	us-gaap	Share Based Compensation ShareBasedCompensation	259000000	USD
CY2019Q2	us-gaap	Share Based Compensation ShareBasedCompensation	130000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	397000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	240000000	USD
CY2020Q2	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	49000000	USD
CY2019Q2	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	25000000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	71000000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	45000000	USD
CY2020Q2	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	138000000	USD
CY2019Q2	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	279000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	104000000	USD
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate	0.15
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Purchase Date ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate	0.15
	tmus	Employee Stock Purchase Plan Offering Period EmployeeStockPurchasePlanOfferingPeriod	P6M
	tmus	Employee Stock Purchase Plans Number Of Securities Remaining For Future Sale And Issuance EmployeeStockPurchasePlansNumberOfSecuritiesRemainingForFutureSaleAndIssuance	5151590	shares
	tmus	Aggregate Number Of Shares Annual Increase Employee Stock Purchase Plans AggregateNumberOfSharesAnnualIncreaseEmployeeStockPurchasePlans	5000000	shares
CY2020Q1	tmus	Additional Shares Of Common Stock Employee Stock Purchase Plan AdditionalSharesOfCommonStockEmployeeStockPurchasePlan	5000000	shares
	tmus	Share Based Compensation Arrangement By Share Based Payment Award Incentive Compensation Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardIncentiveCompensationGrantDateFairValue	163000000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	17000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	17000000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	15000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	15000000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	2000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	2000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	1200000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	1200000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	2100000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	2100000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-900000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-900000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	16000000	USD
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	16000000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Remainder Of Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear	42000000	USD
CY2020Q2	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	42000000	USD
CY2019Q2	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	29000000	USD
	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	79000000	USD
	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	64000000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	611000000	USD
CY2020Q2	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	611000000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2000000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	308000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	596000000	USD
CY2020Q2	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.007
CY2019Q2	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.244
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.294
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.244
CY2020Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-210000000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	939000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	741000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1847000000	USD
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	320000000	USD
CY2019Q2	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
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CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	939000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1061000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1847000000	USD
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1236528444	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	854368443	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1047338364	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	852796369	shares
CY2020Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5767150	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9782025	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	8094501	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1236528444	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	860135593	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1057120389	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	860890870	shares
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.17
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.10
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.71
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.16
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.26
CY2019Q2	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.16
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.17
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.09
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.70
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.14
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.26
CY2019Q2	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
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.14
CY2020Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2020Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	1139000000	USD
CY2019Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	634000000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	1823000000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	1236000000	USD
CY2020Q2	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	180000000	USD
CY2019Q2	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	117000000	USD
	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	325000000	USD
	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	230000000	USD
CY2020Q2	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	20000000	USD
CY2019Q2	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	20000000	USD
	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	40000000	USD
	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	40000000	USD
CY2020Q2	tmus	Finance Lease Expense FinanceLeaseExpense	200000000	USD
CY2019Q2	tmus	Finance Lease Expense FinanceLeaseExpense	137000000	USD
	tmus	Finance Lease Expense FinanceLeaseExpense	365000000	USD
	tmus	Finance Lease Expense FinanceLeaseExpense	270000000	USD
CY2020Q2	us-gaap	Variable Lease Cost VariableLeaseCost	71000000	USD
CY2019Q2	us-gaap	Variable Lease Cost VariableLeaseCost	58000000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	133000000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	123000000	USD
CY2020Q2	us-gaap	Lease Cost LeaseCost	1410000000	USD
CY2019Q2	us-gaap	Lease Cost LeaseCost	829000000	USD
	us-gaap	Lease Cost LeaseCost	2321000000	USD
	us-gaap	Lease Cost LeaseCost	1629000000	USD
CY2020Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2020Q2	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2020Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.040
CY2020Q2	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.035
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	4771000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	1094000000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	4104000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	805000000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	3363000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	445000000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	2782000000	USD
CY2020Q2	tmus	Lease And Service Credit Commitment Due In Rolling After Year Five LeaseAndServiceCreditCommitmentDueInRollingAfterYearFive	5200000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	92000000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	2249000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due In Rolling Year Five FinanceLeaseLiabilityPaymentsDueInRollingYearFive	63000000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	5021000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due In Rolling After Year Five FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive	85000000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	22290000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2584000000	USD
CY2020Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2639000000	USD
CY2020Q2	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	128000000	USD
CY2020Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	19651000000	USD
CY2020Q2	us-gaap	Finance Lease Liability FinanceLeaseLiability	2456000000	USD
CY2020Q2	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	20000000	USD
CY2019Q2	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	21000000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	40000000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	41000000	USD
CY2020Q2	tmus	Lessee Operating Lease Lease Notyet Commenced Payments Due LesseeOperatingLeaseLeaseNotyetCommencedPaymentsDue	340000000	USD
	tmus	Device Upgrade Period DeviceUpgradePeriod	P18M
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Next Rolling Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextRollingTwelveMonths	2848000000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received Rolling Year Two LessorOperatingLeasePaymentsToBeReceivedRollingYearTwo	297000000	USD
CY2020Q2	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	3145000000	USD
CY2020Q2	tmus	Purchase Obligation Due In Next Rolling Twelve Months PurchaseObligationDueInNextRollingTwelveMonths	4200000000	USD
CY2020Q2	tmus	Purchase Obligation Due In Rolling Year Two And Three PurchaseObligationDueInRollingYearTwoAndThree	3500000000	USD
CY2020Q2	tmus	Purchase Obligation Due In Rolling Year Four And Five PurchaseObligationDueInRollingYearFourAndFive	1600000000	USD
CY2020Q2	tmus	Purchase Obligation Due In Rolling After Year Five PurchaseObligationDueInRollingAfterYearFive	1300000000	USD
CY2020Q2	tmus	Lease And Service Credit Commitment Due In Next Rolling Twelve Months LeaseAndServiceCreditCommitmentDueInNextRollingTwelveMonths	277000000	USD
CY2020Q2	tmus	Lease And Service Credit Commitment Due In Rolling Year Two And Three LeaseAndServiceCreditCommitmentDueInRollingYearTwoAndThree	595000000	USD
CY2020Q2	tmus	Lease And Service Credit Commitment Due In Rolling Year Four And Five LeaseAndServiceCreditCommitmentDueInRollingYearFourAndFive	588000000	USD
CY2020Q2	tmus	Lease And Service Credit Commitment Maximum Remaining Commitment LeaseAndServiceCreditCommitmentMaximumRemainingCommitment	93000000	USD
CY2020Q2	tmus	Merger Commitment Settlement Due In Next Rolling Twelve Months MergerCommitmentSettlementDueInNextRollingTwelveMonths	12200000	USD
CY2020Q2	tmus	Merger Commitment Settlement Due In Rolling Year Two And Three MergerCommitmentSettlementDueInRollingYearTwoAndThree	44400000	USD
CY2020Q2	tmus	Merger Commitment Settlement Due In Rolling Year Four And Five MergerCommitmentSettlementDueInRollingYearFourAndFive	17200000	USD
CY2020Q2	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	4960000000	USD
CY2019Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	4322000000	USD
CY2020Q2	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1182000000	USD
CY2019Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	802000000	USD
CY2020Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1242000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	682000000	USD
CY2020Q2	us-gaap	Interest Payable Current InterestPayableCurrent	780000000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	227000000	USD
CY2020Q2	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	338000000	USD
CY2019Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	251000000	USD
CY2020Q2	us-gaap	Restructuring Reserve RestructuringReserve	224000000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	156000000	USD
CY2020Q2	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	140000000	USD
CY2019Q4	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	127000000	USD
CY2020Q2	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	482000000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	179000000	USD
CY2020Q2	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	9348000000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	6746000000	USD
CY2020Q2	us-gaap	Interest Paid Net InterestPaidNet	608000000	USD
CY2019Q2	us-gaap	Interest Paid Net InterestPaidNet	245000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	949000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	585000000	USD
CY2020Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	1269000000	USD
CY2019Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	703000000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	2144000000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	1391000000	USD
CY2020Q2	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	31000000	USD
CY2019Q2	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	40000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	55000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	72000000	USD
CY2020Q2	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	1486000000	USD
CY2019Q2	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	1616000000	USD
	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	3099000000	USD
	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	3128000000	USD
CY2020Q2	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	33533000000	USD
CY2019Q2	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	0	USD
	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	33533000000	USD
	tmus	Noncash Or Part Noncash Acquisition Consideration NoncashOrPartNoncashAcquisitionConsideration	0	USD
CY2020Q2	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	38000000	USD
CY2019Q2	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	113000000	USD
	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	339000000	USD
	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	446000000	USD
CY2020Q2	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1444000000	USD
CY2019Q2	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	167000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1753000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	314000000	USD
CY2020Q2	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	538000000	USD
CY2019Q2	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	67000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	597000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	124000000	USD
CY2020Q2	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	38000000	USD
CY2019Q2	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	50000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	38000000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	300000000	USD
CY2020Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	658000000	USD
CY2019Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1400000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1213000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2094000000	USD
CY2020Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	515000000	USD
CY2019Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	368000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	693000000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	548000000	USD

Files In Submission

Name	View Source	Status
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exhibit427-txmobilex16th.htm	Edgar Link	pending
exhibit427-txmobilex16th001.jpg	Edgar Link	pending
exhibit427-txmobilex16th002.jpg	Edgar Link	pending
exhibit427-txmobilex16th003.jpg	Edgar Link	pending
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exhibit436-txmobilex8ths.htm	Edgar Link	pending
exhibit436-txmobilex8ths001.jpg	Edgar Link	pending
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$TMUS
T-Mobile US, Inc. Stock $tmus

2020 Q2 Form 10-Q Financial Statement

#000128369920000165 Filed on August 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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

2020 Q2 Form 10-Q Financial Statement

#000128369920000165 Filed on August 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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