Additional Financial Information - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions |
Jun. 30, 2021 |
Dec. 31, 2020 |
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| Supplemental Financial Statement Elements [Abstract] | ||
| Accounts payable | $ 3,855 | $ 5,564 |
| Payroll and related benefits | 1,149 | 1,163 |
| Property and other taxes, including payroll | 1,589 | 1,540 |
| Interest | 769 | 771 |
| Commissions | 257 | 399 |
| Toll and interconnect | 331 | 217 |
| Advertising | 65 | 135 |
| Other | 396 | 407 |
| Accounts payable and accrued liabilities | 8,411 | 10,196 |
| Accounts Payable and Accrued Liabilities | ||
| Accounts Payable and Accrued Liabilities [Line Items] | ||
| Outstanding checks | $ 281 | $ 628 |
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- Definition [Line Items] for Accounts Payable and Accrued Liabilities [Table] No definition available.
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- Definition Accrued Liabilities, Toll and Interconnect No definition available.
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- Definition Outstanding Checks No definition available.
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- Definition Supplemental Financial Statement Elements [Abstract] No definition available.
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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying value as of the balance sheet date of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for sales commissions. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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