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Proxy Agreement, Percentage of Voting Interests

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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The maximum number of shares that could be issued to net share settle a contract, if applicable. If a contract does not have a fixed or determinable maximum number of shares that may be required to be issued, disclose the fact that a potentially infinite number of shares could be issued to settle the contract.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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The number of shares that would be issued, determined under the conditions specified in the contract, if the settlement were to occur at the reporting date.

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Additional Financial Information - Financial Information Associated with Supply Chain and Inventory Management Arrangements (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended
	Aug. 03, 2020	Jun. 22, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable			$ 3,355		$ 3,355		$ 1,888
Income Statement [Abstract]
Revenues			17,671	$ 10,979	28,784	$ 22,059
Subsequent Event \| Warrants and Rights Subject to Mandatory Redemption \| Rights Offering
Income Statement [Abstract]
Option to purchase common stock (in shares) (up to)	19,750,000
Subsequent Event \| DT
Income Statement [Abstract]
Percentage of stock held	43.40%
Voting control, percentage	52.40%
Subsequent Event \| SoftBank
Income Statement [Abstract]
Percentage of stock held	8.60%
Subsequent Event \| Other Stockholders
Income Statement [Abstract]
Percentage of stock held	48.00%
Equipment
Income Statement [Abstract]
Revenues			4,269	2,263	6,386	4,779
Cost of services and equipment sales			3,667	$ 2,661	6,196	$ 5,677
Brightstar Corporation
Statement of Financial Position [Abstract]
Accounts receivable			23		23
Accounts payable and accrued expenses and other current liabilities			46		46
Brightstar Corporation \| Equipment
Income Statement [Abstract]
Revenues			42		42
Cost of services and equipment sales			66		66
Brightstar Corporation \| Roaming and other service revenues
Income Statement [Abstract]
Revenues			$ 19		$ 19
DT \| SoftBank \| Direct and Indirect Call Option
Income Statement [Abstract]
Option to purchase shares (in shares) (up to)		101,500,000