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

$tmus Overview Financials Valuation SEC Filings Company Website

2019 Q1 Form 10-K Financial Statement

#000128369920000026 Filed on February 06, 2020

Income Statement

Concept	2019 Q1	2019	2018 Q4
Revenue	$11.08B	$45.00B	$11.45B
YoY Change	5.98%	3.9%	6.38%
Cost Of Revenue	$4.562B	$18.52B	$5.170B
YoY Change	187.1%	0.91%	2.6%
Gross Profit	$6.518B	$26.48B	$6.275B
YoY Change	-26.48%	6.09%	9.7%
Gross Profit Margin	58.83%	58.84%	54.83%
Selling, General & Admin	$3.442B	$14.14B	$3.498B
YoY Change	8.79%	7.43%	6.29%
% of Gross Profit	52.81%	53.4%	55.75%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.600B	$6.616B	$1.640B
YoY Change	1.59%	2.0%	10.44%
% of Gross Profit	24.55%	24.99%	26.14%
Operating Expenses	$3.442B	$14.14B	$5.138B
YoY Change	8.79%	7.43%	7.58%
Operating Profit	$1.476B	$5.722B	$1.137B
YoY Change	15.13%	7.78%	2.25%
Interest Expense	$179.0M	-$1.111B	-$296.0M
YoY Change	-28.69%	-233.05%	-28.5%
% of Operating Profit	12.13%	-19.42%	-26.03%
Other Income/Expense, Net	-$273.0M	-$1.119B	-$3.000M
YoY Change	-31.92%	-19.61%	-118.75%
Pretax Income	$1.203B	$4.603B	$838.0M
YoY Change	36.55%	24.88%	17.37%
Income Tax	$295.0M	$1.135B	$198.0M
% Of Pretax Income	24.52%	24.66%	23.63%
Net Earnings	$908.0M	$3.468B	$640.0M
YoY Change	35.32%	20.08%	-76.36%
Net Earnings / Revenue	8.19%	7.71%	5.59%
Basic Earnings Per Share	$1.07	$4.06	$0.75
Diluted Earnings Per Share	$1.06	$4.02	$0.75
COMMON SHARES
Basic Shares Outstanding	851.2M shares	854.1M shares	849.1M shares
Diluted Shares Outstanding	858.6M shares	863.4M shares	856.3M shares

Balance Sheet

Concept	2019 Q1	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.439B	$1.528B	$1.203B
YoY Change	-43.06%	27.02%	-1.31%
Cash & Equivalents	$1.439B	$1.528B	$1.203B
Short-Term Investments
Other Short-Term Assets	$1.598B	$2.242B	$1.676B
YoY Change	-21.78%	33.77%	-11.93%
Inventory	$1.261B	$964.0M	$1.084B
Prepaid Expenses
Receivables	$1.749B	$1.951B	$1.769B
Other Receivables	$2.482B	$2.620B	$2.549B
Total Short-Term Assets	$8.745B	$9.305B	$8.281B
YoY Change	-8.99%	12.37%	-7.11%
LONG-TERM ASSETS
Property, Plant & Equipment	$21.02B	$35.63B	$23.36B
YoY Change	-5.77%	52.54%	5.24%
Goodwill	$1.901B		$1.901B
YoY Change	0.0%		12.95%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.552B	$1.891B	$1.623B
YoY Change	46.14%	16.51%	77.96%
Total Long-Term Assets	$74.33B	$77.62B	$64.19B
YoY Change	19.12%	20.92%	4.12%
TOTAL ASSETS
Total Short-Term Assets	$8.745B	$9.305B	$8.281B
Total Long-Term Assets	$74.33B	$77.62B	$64.19B
Total Assets	$83.07B	$86.92B	$72.47B
YoY Change	15.37%	19.94%	2.7%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$7.330B	$4.322B	$7.741B
YoY Change	2.42%	-21.23%	-9.23%
Accrued Expenses	$2.202B	$4.711B
YoY Change		109.01%
Deferred Revenue	$665.0M		$698.0M
YoY Change	-15.07%		-10.4%
Short-Term Debt	$848.0M	$0.00	$841.0M
YoY Change	-77.48%		-47.83%
Long-Term Debt Due	$911.0M	$982.0M	$841.0M
YoY Change		16.77%
Total Short-Term Liabilities	$13.33B	$12.51B	$10.27B
YoY Change	7.85%	21.81%	-10.84%
LONG-TERM LIABILITIES
Long-Term Debt	$10.95B	$28.53B	$12.12B
YoY Change	-9.69%	-2.52%	0.02%
Other Long-Term Liabilities	$903.0M	$11.49B	$967.0M
YoY Change	-3.22%	206.64%	3.42%
Total Long-Term Liabilities	$43.57B	$40.02B	$37.48B
YoY Change	18.48%	21.23%	2.72%
TOTAL LIABILITIES
Total Short-Term Liabilities	$13.33B	$12.51B	$10.27B
Total Long-Term Liabilities	$43.57B	$40.02B	$37.48B
Total Liabilities	$56.89B	$58.13B	$47.75B
YoY Change	15.8%	21.74%	-0.53%
SHAREHOLDERS EQUITY
Retained Earnings	-$12.30B		-$12.95B
YoY Change	-22.44%		-19.41%
Common Stock	$38.10B		$38.01B
YoY Change	0.11%		-1.6%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$5.000M		$6.000M
YoY Change	-28.57%		50.0%
Treasury Stock Shares	1.479M shares		1.495M shares
Shareholders Equity	$26.18B	$28.79B	$24.72B
YoY Change
Total Liabilities & Shareholders Equity	$83.07B	$86.92B	$72.47B
YoY Change	15.37%	19.94%	2.7%

Cashflow Statement

Concept	2019 Q1	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	$908.0M	$3.468B	$640.0M
YoY Change	35.32%	20.08%	-76.36%
Depreciation, Depletion And Amortization	$1.600B	$6.616B	$1.640B
YoY Change	1.59%	2.0%	10.44%
Cash From Operating Activities	$1.392B	$6.824B	$954.0M
YoY Change	80.78%	75.02%	10.29%
INVESTING ACTIVITIES
Capital Expenditures	$1.931B	$6.391B	-$1.210B
YoY Change	41.36%	15.34%	30.25%
Acquisitions	$0.00	$31.00M
YoY Change	-100.0%	-90.83%
Other Investing Activities	$7.000M	$18.00M	$1.441B
YoY Change	0.0%	-185.71%	20.48%
Cash From Investing Activities	-$966.0M	-$4.125B	$231.0M
YoY Change	109.09%	612.44%	-13.48%
FINANCING ACTIVITIES
Cash Dividend Paid		$0.00
YoY Change
Common Stock Issuance & Retirement, Net	$0.00	$0.00
YoY Change	-100.0%	-100.0%
Debt Paid & Issued, Net	$0.00	$600.0M
YoY Change	-100.0%	-82.08%
Cash From Financing Activities	-$190.0M	-$2.374B	-311.0M
YoY Change	-119.0%	-28.84%	-52.3%
NET CHANGE
Cash From Operating Activities	$1.392B	$6.824B	954.0M
Cash From Investing Activities	-$966.0M	-$4.125B	231.0M
Cash From Financing Activities	-$190.0M	-$2.374B	-311.0M
Net Change In Cash	$236.0M	$325.0M	874.0M
YoY Change	-81.96%	-2131.25%	82.08%
FREE CASH FLOW
Cash From Operating Activities	$1.392B	$6.824B	$954.0M
Capital Expenditures	$1.931B	$6.391B	-$1.210B
Free Cash Flow	-$539.0M	$433.0M	$2.164B
YoY Change	-9.56%	-126.37%	20.62%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
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CY2019Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
CY2019	tmus	Employee Stock Purchase Plan Offering Period EmployeeStockPurchasePlanOfferingPeriod	P6M
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CY2019Q4	us-gaap	Purchase Obligation Due In Second And Third Year PurchaseObligationDueInSecondAndThirdYear	3300000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Fourth And Fifth Year PurchaseObligationDueInFourthAndFifthYear	1600000000	USD
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CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-33409
CY2019	dei	Entity Registrant Name EntityRegistrantName	T-MOBILE US, INC.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-0836269
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	12920 SE 38th Street
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Bellevue
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98006-1350
CY2019	dei	City Area Code CityAreaCode	(425)
CY2019	dei	Local Phone Number LocalPhoneNumber	378-4000
CY2019	dei	Security12b Title Security12bTitle	Common Stock, par value $0.00001 per share
CY2019	dei	Trading Symbol TradingSymbol	TMUS
CY2019	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	3468000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	2888000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	4536000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	7000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-187000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-115000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-536000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-332000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-536000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-332000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2932000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2556000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4543000000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.06
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.40
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.39
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.02
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.36
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.20
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	854143751	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	849744152	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	831850073	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	863433511	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	858290174	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	871787450	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3468000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	2888000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	4536000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6616000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6486000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5984000000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	495000000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	424000000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	306000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1091000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	980000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1404000000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	307000000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	297000000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	388000000	USD
CY2019	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-130000000	USD
CY2018	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-157000000	USD
CY2017	us-gaap	Securitization Financial Asset For Which Transfer Is Accounted As Sale Gain Loss On Sale SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale	-299000000	USD
CY2019	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	0	USD
CY2018	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	26000000	USD
CY2017	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	76000000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-19000000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-122000000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-86000000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0	USD
CY2018	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0	USD
CY2017	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	235000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3709000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4617000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3931000000	USD
CY2019	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	1015000000	USD
CY2018	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	1598000000	USD
CY2017	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	1812000000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	617000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	201000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3899000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	844000000	USD
CY2019	tmus	Increase Decreasein Operating Lease Rightof Use Asset IncreaseDecreaseinOperatingLeaseRightofUseAsset	-1896000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	144000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	181000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	575000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	17000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-867000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	1079000000	USD
CY2019	tmus	Increase Decreasein Operating Lease Liability IncreaseDecreaseinOperatingLeaseLiability	-2131000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	144000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-69000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-233000000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	257000000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	52000000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	111000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	6824000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3831000000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	473000000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	362000000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	136000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6391000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5541000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5237000000	USD
CY2019	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	967000000	USD
CY2018	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	127000000	USD
CY2017	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	5828000000	USD
CY2019	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	38000000	USD
CY2018	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	0	USD
CY2017	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	0	USD
CY2019	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	3876000000	USD
CY2018	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	5406000000	USD
CY2017	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	4319000000	USD
CY2019	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	632000000	USD
CY2018	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
CY2017	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	31000000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	338000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	18000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-21000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4125000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-579000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6745000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2494000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	10480000000	USD
CY2019	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	2340000000	USD
CY2018	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	6265000000	USD
CY2017	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	2910000000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	2340000000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	6265000000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	2910000000	USD
CY2019	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	798000000	USD
CY2018	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	700000000	USD
CY2017	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	486000000	USD
CY2019	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	775000000	USD
CY2018	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	300000000	USD
CY2017	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	300000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	600000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3349000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	10230000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1071000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	427000000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	156000000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	146000000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	166000000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	0	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	0	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	55000000	USD
CY2019	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	28000000	USD
CY2018	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	212000000	USD
CY2017	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	188000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-17000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-52000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	5000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2374000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3336000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1367000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	325000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-16000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4281000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1203000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1219000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5500000000	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
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1219000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1128000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	1525000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	2028000000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	2783000000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	88000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	51000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	31000000	USD
CY2019	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	6509000000	USD
CY2018	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	4972000000	USD
CY2017	us-gaap	Consideration Received For Beneficial Interest Obtained For Transferring Financial Asset ConsiderationReceivedForBeneficialInterestObtainedForTransferringFinancialAsset	4063000000	USD
CY2019	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	935000000	USD
CY2018	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	-65000000	USD
CY2017	tmus	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	-313000000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1006000000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1011000000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1131000000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	267000000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	326000000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Inventory Acquired1 NoncashOrPartNoncashAcquisitionInventoryAcquired1	742000000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	800000000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	291000000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	292000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3621000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1041000000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	885000000	USD
CY2017	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	887000000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	18236000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	4536000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7000000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	344000000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	19000000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	82000000	USD
CY2017	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	166000000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	444000000	USD
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	55000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	22559000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	2888000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-332000000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	473000000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3000000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	103000000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	146000000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1054000000	USD
CY2018	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	224000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	24718000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3468000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-536000000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	517000000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1000000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	124000000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	156000000	USD
CY2019	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	653000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	28789000000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	<div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Description of Business</span></div><div><span><br/></span></div><div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%;">T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”), together with its consolidated subsidiaries, is a leading provider of mobile communications services, including voice, messaging and data, under its flagship brands, T-Mobile and Metro™ by T-Mobile ("Metro by T-Mobile"), in the United States (“U.S.”), Puerto Rico and the U.S. Virgin Islands. All of our revenues were earned in, and all of our long-lived assets are located in, the U.S., Puerto Rico and the U.S. Virgin Islands. We provide mobile communications services primarily using our 4G Long-Term Evolution (“LTE”) network and our newly deployed 5G technology network. We also offer a wide selection of wireless devices, including handsets, tablets and other mobile communication devices, and accessories for sale, as well as financing through Equipment Installment Plans (“EIP”) and leasing through JUMP! On Demand™. Additionally, we provide reinsurance for handset insurance policies and extended warranty contracts offered to our mobile communications customers.</span></div>
CY2019	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. These estimates are inherently subject to judgment and actual results could differ from these estimates.
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Certain prior year amounts have been reclassified to conform to the current year's presentation. See “Accounting Pronouncements Adopted During the Current Year” below.
CY2019	tmus	Receivable With Imputed Interest Discount And Allowances Percentage Of Gross Accounts Receivable ReceivableWithImputedInterestDiscountAndAllowancesPercentageOfGrossAccountsReceivable	0.070
CY2018	tmus	Receivable With Imputed Interest Discount And Allowances Percentage Of Gross Accounts Receivable ReceivableWithImputedInterestDiscountAndAllowancesPercentageOfGrossAccountsReceivable	0.081
CY2019	tmus	Device Upgrade Period DeviceUpgradePeriod	P18M
CY2019Q4	tmus	Number Of Upgrade Options NumberOfUpgradeOptions	1	option
CY2019	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	unit
CY2019	tmus	Licenses Issued Fixed Period LicensesIssuedFixedPeriod	P15Y
CY2019	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	unit
CY2019	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Derivative Financial Instruments</span></div><div><span><br/></span></div><div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Derivative financial instruments are recognized as either assets or liabilities and are measured at fair value. We do not use derivatives for trading or speculative purposes.</span></div><div><span><br/></span></div><div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">For derivative instruments designated as cash flow hedges associated with forecasted debt issuances, changes in fair value are reported as a component of Accumulated other comprehensive loss until reclassified into Interest expense in the same period the hedged transaction affects earnings, generally over the life of the related debt. Unrealized gains on derivatives designated as cash flow hedges are recorded at fair value as assets, and unrealized losses on derivatives designated as cash flow hedges are recorded at fair value as liabilities.</span></div>
CY2019	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	93000000	USD
CY2018	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	161000000	USD
CY2017	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	258000000	USD
CY2019	tmus	Device Upgrade Period DeviceUpgradePeriod	P18M
CY2019Q4	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P24M
CY2019	us-gaap	Advertising Expense AdvertisingExpense	1600000000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	1700000000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	1800000000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1676000000	USD
CY2019Q1	us-gaap	Other Assets Current OtherAssetsCurrent	1598000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23359000000	USD
CY2019Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	21020000000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	9251000000	USD
CY2019Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2271000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	198000000	USD
CY2019Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	186000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1623000000	USD
CY2019Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1552000000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	7741000000	USD
CY2019Q1	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	7676000000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	787000000	USD
CY2019Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	815000000	USD
CY2018Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	12965000000	USD
CY2019Q1	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	10950000000	USD
CY2018Q4	us-gaap	Sale Leaseback Transaction Amount Due Under Financing Arrangement SaleLeasebackTransactionAmountDueUnderFinancingArrangement	2557000000	USD
CY2019Q1	us-gaap	Sale Leaseback Transaction Amount Due Under Financing Arrangement SaleLeasebackTransactionAmountDueUnderFinancingArrangement	2212000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	4472000000	USD
CY2019Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	4703000000	USD
CY2018Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	2781000000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	11364000000	USD
CY2019Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	2016000000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	967000000	USD
CY2019Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	903000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-12954000000	USD
CY2019Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-12301000000	USD
CY2019	tmus	Numberof Portfolio Segments NumberofPortfolioSegments	2	segment
CY2019	tmus	Numberof Customer Classes NumberofCustomerClasses	2	class
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4582000000	USD
CY2018Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4534000000	USD
CY2019Q4	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	299000000	USD
CY2018Q4	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	330000000	USD
CY2019Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	4283000000	USD
CY2018Q4	us-gaap	Receivable With Imputed Interest Net Amount ReceivableWithImputedInterestNetAmount	4204000000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	100000000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	119000000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4183000000	USD
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4085000000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4183000000	USD
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4085000000	USD
CY2018Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	516000000	USD
CY2017Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	482000000	USD
CY2016Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	418000000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	307000000	USD
CY2018	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	297000000	USD
CY2017	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	388000000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	332000000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	328000000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	393000000	USD
CY2019	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	136000000	USD
CY2018	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	250000000	USD
CY2017	tmus	Receivable With Imputed Interest Discount Increase Decrease ReceivableWithImputedInterestDiscountIncreaseDecrease	252000000	USD
CY2019	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	167000000	USD
CY2018	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	185000000	USD
CY2017	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	183000000	USD
CY2019Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	460000000	USD
CY2018Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	516000000	USD
CY2017Q4	tmus	Unamortized Imputed Discountand Allowancefor Credit Losses UnamortizedImputedDiscountandAllowanceforCreditLosses	482000000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4582000000	USD
CY2018Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4534000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33118000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	31297000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	21984000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23359000000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	473000000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	362000000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	136000000	USD
CY2019Q4	tmus	Property Subject To Sale Number Of Units PropertySubjectToSaleNumberOfUnits	168	tower_site
CY2019Q4	tmus	Proceeds From Sales Of Tower Sites ProceedsFromSalesOfTowerSites	38000000	USD
CY2019Q4	tmus	Gain Loss On Sales Of Tower Sites GainLossOnSalesOfTowerSites	13000000	USD
CY2019	tmus	Property Plant And Equipment Leaseback Initial Term PropertyPlantAndEquipmentLeasebackInitialTerm	P10Y
CY2019	us-gaap	Depreciation Depreciation	6000000000.0	USD
CY2018	us-gaap	Depreciation Depreciation	6400000000	USD
CY2017	us-gaap	Depreciation Depreciation	5800000000	USD
CY2019	tmus	Depreciation Expensefor Leased Wireless Devices DepreciationExpenseforLeasedWirelessDevices	543000000	USD
CY2018	tmus	Depreciation Expensefor Leased Wireless Devices DepreciationExpenseforLeasedWirelessDevices	940000000	USD
CY2017	tmus	Depreciation Expensefor Leased Wireless Devices DepreciationExpenseforLeasedWirelessDevices	1000000000.0	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	609000000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	562000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	35000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	26000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	9000000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	32000000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	30000000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-15000000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	659000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	609000000	USD
CY2019Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	159000000	USD
CY2018Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	194000000	USD
CY2018Q4	us-gaap	Goodwill Gross GoodwillGross	12449000000	USD
CY2018Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	10766000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1901000000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	29000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1930000000	USD
CY2019Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	10766000000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	USD
CY2019	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	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
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1565000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1367000000	USD
CY2019Q4	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-632000000	USD
CY2019Q2	us-gaap	Embedded Derivative Gain On Embedded Derivative EmbeddedDerivativeGainOnEmbeddedDerivative	11000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	198000000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	82000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	124000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	163000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	83000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	14000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	3000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	3000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	9000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	115000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-868000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-332000000	USD
CY2018Q4	us-gaap	Embedded Derivative Fair Value Of Embedded Derivative Liability EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability	19000000	USD
CY2019	us-gaap	Embedded Derivative Gain On Embedded Derivative EmbeddedDerivativeGainOnEmbeddedDerivative	8000000	USD
CY2018	us-gaap	Embedded Derivative Gain On Embedded Derivative EmbeddedDerivativeGainOnEmbeddedDerivative	29000000	USD
CY2017	us-gaap	Embedded Derivative Gain On Embedded Derivative EmbeddedDerivativeGainOnEmbeddedDerivative	52000000	USD
CY2019Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	62000000	USD
CY2018Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	73000000	USD
CY2018Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	2015000000	USD
CY2019Q4	tmus	Financing Arrangement For Property Plant And Equipment FinancingArrangementForPropertyPlantAndEquipment	25000000	USD
CY2019Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	46000000	USD
CY2018Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	56000000	USD
CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	24969000000	USD
CY2018Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	27547000000	USD
CY2018Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	841000000	USD
CY2019Q4	tmus	Financing Arrangement For Property Plant And Equipment Current FinancingArrangementForPropertyPlantAndEquipmentCurrent	25000000	USD
CY2019Q4	tmus	Longterm Debtand Longterm Debtto Affiliates LongtermDebtandLongtermDebttoAffiliates	24944000000	USD
CY2018Q4	tmus	Longterm Debtand Longterm Debtto Affiliates LongtermDebtandLongtermDebttoAffiliates	26706000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	10958000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	12124000000	USD
CY2019Q4	tmus	Longterm Debtand Longterm Debtto Affiliates LongtermDebtandLongtermDebttoAffiliates	24944000000	USD
CY2018Q4	tmus	Longterm Debtand Longterm Debtto Affiliates LongtermDebtandLongtermDebttoAffiliates	26706000000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	25000000	USD
CY2019Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	113000000	USD
CY2018Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	86000000	USD
CY2019Q4	us-gaap	Sale Leaseback Transaction Net Book Value SaleLeasebackTransactionNetBookValue	198000000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	644000000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P24M
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	710000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1300000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	894000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	791000000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	906000000	USD
CY2018Q4	us-gaap	Sale Leaseback Transaction Net Book Value SaleLeasebackTransactionNetBookValue	329000000	USD
CY2019Q4	tmus	Minimum Lease Payments Failed Sale Leaseback Transaction Next Twelve Months MinimumLeasePaymentsFailedSaleLeasebackTransactionNextTwelveMonths	160000000	USD
CY2019Q4	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Two And Three Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinTwoAndThreeYears	321000000	USD
CY2019Q4	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Within Four And Five Years MinimumLeasePaymentsFailedSaleLeasebackTransactionsWithinFourAndFiveYears	320000000	USD
CY2019Q4	tmus	Minimum Lease Payments Failed Sale Leaseback Transactions Thereafter MinimumLeasePaymentsFailedSaleLeasebackTransactionsThereafter	467000000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	51000000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	645000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	63000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	560000000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	12000000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-85000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	50000000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	51000000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	643000000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	604000000	USD
CY2018	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	267000000	USD
CY2018	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2019	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	495000000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	424000000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	306000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	92000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	81000000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	73000000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	156000000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	146000000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate	0.15
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Purchase Date ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate	0.15
CY2019	tmus	Employee Stock Purchase Plans Number Of Securities Remaining For Future Sale And Issuance EmployeeStockPurchasePlansNumberOfSecuritiesRemainingForFutureSaleAndIssuance	1397894	shares
CY2019	tmus	Aggregate Number Of Shares Annual Increase Employee Stock Purchase Plans AggregateNumberOfSharesAnnualIncreaseEmployeeStockPurchasePlans	5000000	shares
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	119000000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	102000000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	87000000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	16738758	shares
CY2018	tmus	Stock Repurchasedand Retired During Period Average Cost Per Share StockRepurchasedandRetiredDuringPeriodAverageCostPerShare	62.96
CY2018	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	1054000000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	7010889	shares
CY2017	tmus	Stock Repurchasedand Retired During Period Average Cost Per Share StockRepurchasedandRetiredDuringPeriodAverageCostPerShare	63.34
CY2017	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	444000000	USD
	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	23749647	shares
	tmus	Stock Repurchasedand Retired During Period Average Cost Per Share StockRepurchasedandRetiredDuringPeriodAverageCostPerShare	63.07
	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	1498000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	4557000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	3686000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	3274000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	46000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	231000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-113000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4603000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3917000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3161000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-24000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-39000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	70000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	63000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	28000000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-2000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	25000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	44000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	49000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	29000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	954000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	750000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1182000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	125000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	160000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-173000000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	12000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	70000000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-49000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1091000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	980000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1404000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1135000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1029000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1375000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.004
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.019
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.689
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.018
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.016
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.114
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.051
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.048
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.048
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.006
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.006
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.024
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.003
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.024
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.015
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.012
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.013
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.005
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.008
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.029
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.003
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2019Q4	tmus	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	3403000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	659000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.247
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.263
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.435
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	823000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1526000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	784000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	668000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	331000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	340000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	903000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	620000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	6119000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3938000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	129000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	210000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5990000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3728000000	USD
CY2019Q4	tmus	Deferred Tax Liabilities Goodwilland Intangible Assets Indefinite Lived Intangible Assets DeferredTaxLiabilitiesGoodwillandIntangibleAssetsIndefiniteLivedIntangibleAssets	5902000000	USD
CY2018Q4	tmus	Deferred Tax Liabilities Goodwilland Intangible Assets Indefinite Lived Intangible Assets DeferredTaxLiabilitiesGoodwillandIntangibleAssetsIndefiniteLivedIntangibleAssets	5494000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2506000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2434000000	USD
CY2019Q4	tmus	Deferred Tax Liabilities Operating Lease Right Of Use Asset DeferredTaxLiabilitiesOperatingLeaseRightOfUseAsset	2881000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	19000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	40000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	289000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	232000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	11597000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	8200000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5607000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	4472000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5607000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	4472000000	USD
CY2019Q4	tmus	Unrecognized Tax Benefits Indirect Tax Effects Excluded UnrecognizedTaxBenefitsIndirectTaxEffectsExcluded	63000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	23000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	129000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	210000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	273000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	462000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	412000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	410000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	7000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	6000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	10000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	10000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	59000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	34000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	12000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	514000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	462000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	412000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	367000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	315000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3468000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	2888000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	4536000000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
CY2017	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	55000000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3468000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2888000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4481000000	USD
CY2019	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	0	USD
CY2018	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	0	USD
CY2017	us-gaap	Convertible Preferred Dividends Net Of Tax ConvertiblePreferredDividendsNetOfTax	55000000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	3468000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	2888000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	4536000000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	854143751	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	849744152	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	831850073	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9289760	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	8546022	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9200873	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	30736504	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	863433511	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	858290174	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	871787450	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.06
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.40
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.39
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.02
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.36
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.20
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	2558000000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	523000000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	82000000	USD
CY2019	tmus	Finance Lease Expense FinanceLeaseExpense	605000000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	243000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	3406000000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.048
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.040
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	2754000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	1013000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	2583000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	733000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	2311000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	414000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	1908000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	101000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	1615000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	478000000	USD
CY2019Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	3100000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Five FinanceLeaseLiabilityPaymentsDueInRollingYearFive	71000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	3797000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due In Rolling After Year Five FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive	115000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	14968000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2447000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2142000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	144000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12826000000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2303000000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	82000000	USD
CY2019Q4	tmus	Lessee Operating Lease Lease Notyet Commenced Payments Due LesseeOperatingLeaseLeaseNotyetCommencedPaymentsDue	341000000	USD
CY2019	tmus	Device Upgrade Period DeviceUpgradePeriod	P18M
CY2018Q4	us-gaap	Property Subject To Or Available For Operating Lease Gross PropertySubjectToOrAvailableForOperatingLeaseGross	1159000000	USD
CY2018Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	622000000	USD
CY2018Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	537000000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Rolling Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextRollingTwelveMonths	417000000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Rolling Year Two LessorOperatingLeasePaymentsToBeReceivedRollingYearTwo	99000000	USD
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	516000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	2700000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two And Three Years OperatingLeasesFutureMinimumPaymentsDueInTwoAndThreeYears	4700000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four And Five Years OperatingLeasesFutureMinimumPaymentsDueInFourAndFiveYears	3300000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	3800000000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3000000000.0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	419000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	59000000	USD
CY2018Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	867000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Remainder Of Fiscal Year CapitalLeasesFutureMinimumPaymentsRemainderOfFiscalYear	909000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	631000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	389000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	102000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	66000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	106000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	2203000000	USD
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CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1541000000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1471000000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1234000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	5722000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	908000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	939000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	870000000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	751000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	3468000000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	908000000	USD
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	856294467	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	854143751	shares
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	870000000	USD
CY2019Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	751000000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3468000000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.07
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.02
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.06
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.01
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.87
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.02
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	851223498	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	854368443	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	854578241	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	858643481	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	860135593	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	862690751	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	864158739	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	863433511	shares
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	10455000000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	10571000000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	10839000000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11445000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	43310000000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1282000000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1450000000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1440000000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1137000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	5309000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	671000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	782000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	795000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	640000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	2888000000	USD
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	671000000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	782000000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	795000000	USD
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	640000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2888000000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.75
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.40
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.36
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	855222664	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	847660488	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	847087120	shares
CY2018Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	849102785	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	849744152	shares
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	862244084	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	852040670	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	853852764	shares
CY2018Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	856344347	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	858290174	shares

Files In Submission

Name	View Source	Status
0001283699-20-000026-index-headers.html	Edgar Link	pending
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0001283699-20-000026.txt	Edgar Link	pending
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tmus-20191231_htm.xml	Edgar Link	completed
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tmus-20191231_pre.xml	Edgar Link	unprocessable

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

2019 Q1 Form 10-K Financial Statement

#000128369920000026 Filed on February 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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

2019 Q1 Form 10-K Financial Statement

#000128369920000026 Filed on February 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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