Accounting Changes and Recent Accounting Pronouncements (Policies)	3 Months Ended
Mar. 31, 2019
Accounting Changes and Error Corrections [Abstract]
Accounting Changes and Recent Accounting Pronouncements	Accounting Changes ASU 2016-02 In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (ASU 2016-02), which, for most leases, results in lessees recognizing right-of-use (ROU) assets and lease liabilities on the balance sheet. ASU 2016-02, as amended by ASU No. 2018-11, Targeted Improvements, requires lessees and lessors to recognize and measure leases at the beginning of the earliest period presented using one of two modified retrospective approaches. A number of optional practical expedients may be applied in transition. We adopted ASU 2016-02 on January 1, 2019. The main impact of the adoption of ASU 2016-02 relates to the recognition of ROU assets and lease liabilities on our consolidated balance sheet for those leases classified as operating leases under previous U.S. GAAP. In transition, we have applied the practical expedients that permit us not to reassess (i) whether expired or existing contracts contain a lease under the new standard, (ii) the lease classification for expired or existing leases or (iii) whether previously-capitalized initial direct costs would qualify for capitalization under the new standard. In addition, we have not used hindsight during transition. Upon adoption of ASU 2016-02, on January 1, 2019 our continuing operations recorded (i) ROU assets of $545.1 million and lease liabilities of $558.1 million related to operating leases, (ii) ROU assets and lease liabilities related to finance leases of $26.2 million and (iii) a decrease to our accumulated deficit of $1.2 million. In addition, we reclassified our existing prepaid lease expense, accrued lease expense and lease incentive liabilities, resulting in a net reduction of our ROU assets of $14.2 million. The adoption of ASU 2016-02 did not have a significant impact on our consolidated statements of operations or cash flows for the three months ended March 31, 2019. We have implemented a new lease accounting system and related internal controls over financial reporting to meet the requirements of ASU 2016-02. For additional information regarding our leases, see note 10. Recent Accounting Pronouncements ASU 2018-15 In August 2018, the FASB issued ASU No. 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract (ASU 2018-15), which requires entities to defer implementation costs incurred that are related to the application development stage in a cloud computing arrangement that is a service contract. Deferred implementation costs will be amortized over the term of the cloud computing arrangement and presented in the same expense line item as the cloud computing arrangement. All other implementation costs will be expensed as incurred. ASU 2018-15 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the effect that ASU 2018-15 will have on our consolidated financial statements. ASU 2019-02 In March 2019, the FASB issued ASU No. 2019-02, Improvements to Accounting for Costs of Films and License Agreements for Program Materials (ASU 2019-02), which aligns the accounting for production costs of an episodic television series with the accounting for production costs of films. ASU 2019-02 removes the existing constraint that restricts capitalization of production costs to contracted revenue for episodic television series. The amended guidance also requires entities to test a film or license agreement for impairment at the film group level, addresses cash flow classification and provides new disclosure requirements. ASU 2019-02 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the effect that ASU 2019-02 will have on our consolidated financial statements.
Revenue Recognition and Related Costs	Contract Balances The timing of our recognition of revenue may differ from the timing of invoicing our customers. We record a trade receivable when we have transferred goods or services to a customer but have not yet received payment. Our trade receivables are reported net of an allowance for doubtful accounts. Such allowance aggregated $47.4 million and $45.8 million at March 31, 2019 and December 31, 2018, respectively. If we transfer goods or services to a customer but do not have an unconditional right to payment, we record a contract asset. Contract assets typically arise from the uniform recognition of introductory promotional discounts over the contract period and accrued revenue for handset sales. Our contract assets were $47.1 million and $44.3 million as of March 31, 2019 and December 31, 2018, respectively. The current and long-term portions of our contract asset balances are included within other current assets and other assets, net, respectively, on our condensed consolidated balance sheets. We record deferred revenue when we receive payment prior to transferring goods or services to a customer. We primarily defer revenue for (i) installation and other upfront services and (ii) other services that are invoiced prior to when services are provided. Our deferred revenue balances were $829.8 million and $877.9 million as of March 31, 2019 and December 31, 2018, respectively. The decrease in deferred revenue for the three months ended March 31, 2019 is primarily due to $697.5 million of revenue recognized that was included in our deferred revenue balance at December 31, 2018, partially offset by advanced billings in certain markets. The current and long-term portions of our deferred revenue balances are included within deferred revenue and other long-term liabilities, respectively, on our condensed consolidated balance sheets. Contract Costs Our aggregate assets associated with incremental costs to obtain and fulfill our contracts were $73.4 million and $73.0 million at March 31, 2019 and December 31, 2018, respectively. The current and long-term portions of our assets related to contract costs are included within other current assets and other assets, net, respectively, on our condensed consolidated balance sheets. We amortized $24.4 million to operating costs and expenses during the three months ended March 31, 2019 related to these assets. Unsatisfied Performance Obligations A large portion of our revenue is derived from customers who are not subject to contracts. Revenue from customers who are subject to contracts is generally recognized over the term of such contracts, which is typically 12 months for our residential service contracts, one to three years for our mobile service contracts and one to five years for our B2B service contracts.
Leases	Policies For leases with a term greater than 12 months, we recognize on the lease commencement date (i) ROU assets representing our right to use an underlying asset and (ii) lease liabilities representing our obligation to make lease payments over the lease term. Lease and non-lease components in a contract are generally accounted for separately. We initially measure lease liabilities at the present value of the remaining lease payments over the lease term. Options to extend or terminate the lease are included only when it is reasonably certain that we will exercise that option. As most of our leases do not provide enough information to determine an implicit interest rate, we generally use a portfolio level incremental borrowing rate in our present value calculation. We initially measure ROU assets at the value of the lease liability, plus any initial direct costs and prepaid lease payments, less any lease incentives received. With respect to our finance leases, (i) ROU assets are generally depreciated on a straight-line basis over the shorter of the lease term or the useful life of the asset and (ii) interest expense on the lease liability is recorded using the effective interest method. Operating lease expense is recognized on a straight-line basis over the lease term. For leases with a term of 12 months or less (short-term leases), we do not recognize ROU assets or lease liabilities. Short-term lease expense is recognized on a straight-line basis over the lease term.

Accounting Changes and Recent Accounting Pronouncements (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Changes and Error Corrections [Abstract]

Accounting Changes and Recent Accounting Pronouncements

Accounting Changes

ASU 2016-02

In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (ASU 2016-02), which, for most leases, results in lessees recognizing right-of-use (ROU) assets and lease liabilities on the balance sheet. ASU 2016-02, as amended by ASU No. 2018-11, Targeted Improvements, requires lessees and lessors to recognize and measure leases at the beginning of the earliest period presented using one of two modified retrospective approaches. A number of optional practical expedients may be applied in transition. We adopted ASU 2016-02 on January 1, 2019.

The main impact of the adoption of ASU 2016-02 relates to the recognition of ROU assets and lease liabilities on our consolidated balance sheet for those leases classified as operating leases under previous U.S. GAAP. In transition, we have applied the practical expedients that permit us not to reassess (i) whether expired or existing contracts contain a lease under the new standard, (ii) the lease classification for expired or existing leases or (iii) whether previously-capitalized initial direct costs would qualify for capitalization under the new standard. In addition, we have not used hindsight during transition.

Upon adoption of ASU 2016-02, on January 1, 2019 our continuing operations recorded (i) ROU assets of $545.1 million and lease liabilities of $558.1 million related to operating leases, (ii) ROU assets and lease liabilities related to finance leases of $26.2 million and (iii) a decrease to our accumulated deficit of $1.2 million. In addition, we reclassified our existing prepaid lease expense, accrued lease expense and lease incentive liabilities, resulting in a net reduction of our ROU assets of $14.2 million. The adoption of ASU 2016-02 did not have a significant impact on our consolidated statements of operations or cash flows for the three months ended March 31, 2019.

We have implemented a new lease accounting system and related internal controls over financial reporting to meet the requirements of ASU 2016-02.

For additional information regarding our leases, see note 10.

Recent Accounting Pronouncements

ASU 2018-15

In August 2018, the FASB issued ASU No. 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract (ASU 2018-15), which requires entities to defer implementation costs incurred that are related to the application development stage in a cloud computing arrangement that is a service contract. Deferred implementation costs will be amortized over the term of the cloud computing arrangement and presented in the same expense line item as the cloud computing arrangement. All other implementation costs will be expensed as incurred. ASU 2018-15 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the effect that ASU 2018-15 will have on our consolidated financial statements.

ASU 2019-02

In March 2019, the FASB issued ASU No. 2019-02, Improvements to Accounting for Costs of Films and License Agreements for Program Materials (ASU 2019-02), which aligns the accounting for production costs of an episodic television series with the accounting for production costs of films. ASU 2019-02 removes the existing constraint that restricts capitalization of production costs to contracted revenue for episodic television series. The amended guidance also requires entities to test a film or license agreement for impairment at the film group level, addresses cash flow classification and provides new disclosure requirements. ASU 2019-02 is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the effect that ASU 2019-02 will have on our consolidated financial statements.

Revenue Recognition and Related Costs

Contract Balances

The timing of our recognition of revenue may differ from the timing of invoicing our customers. We record a trade receivable when we have transferred goods or services to a customer but have not yet received payment. Our trade receivables are reported net of an allowance for doubtful accounts. Such allowance aggregated $47.4 million and $45.8 million at March 31, 2019 and December 31, 2018, respectively.

If we transfer goods or services to a customer but do not have an unconditional right to payment, we record a contract asset. Contract assets typically arise from the uniform recognition of introductory promotional discounts over the contract period and accrued revenue for handset sales. Our contract assets were $47.1 million and $44.3 million as of March 31, 2019 and December 31, 2018, respectively. The current and long-term portions of our contract asset balances are included within other current assets and other assets, net, respectively, on our condensed consolidated balance sheets.

We record deferred revenue when we receive payment prior to transferring goods or services to a customer. We primarily defer revenue for (i) installation and other upfront services and (ii) other services that are invoiced prior to when services are provided. Our deferred revenue balances were $829.8 million and $877.9 million as of March 31, 2019 and December 31, 2018, respectively. The decrease in deferred revenue for the three months ended March 31, 2019 is primarily due to $697.5 million of revenue recognized that was included in our deferred revenue balance at December 31, 2018, partially offset by advanced billings in certain markets. The current and long-term portions of our deferred revenue balances are included within deferred revenue and other long-term liabilities, respectively, on our condensed consolidated balance sheets.

Contract Costs

Our aggregate assets associated with incremental costs to obtain and fulfill our contracts were $73.4 million and $73.0 million at March 31, 2019 and December 31, 2018, respectively. The current and long-term portions of our assets related to contract costs are included within other current assets and other assets, net, respectively, on our condensed consolidated balance sheets. We amortized $24.4 million to operating costs and expenses during the three months ended March 31, 2019 related to these assets.

Unsatisfied Performance Obligations

A large portion of our revenue is derived from customers who are not subject to contracts. Revenue from customers who are subject to contracts is generally recognized over the term of such contracts, which is typically 12 months for our residential service contracts, one to three years for our mobile service contracts and one to five years for our B2B service contracts.

Leases

Policies

For leases with a term greater than 12 months, we recognize on the lease commencement date (i) ROU assets representing our right to use an underlying asset and (ii) lease liabilities representing our obligation to make lease payments over the lease term. Lease and non-lease components in a contract are generally accounted for separately.

We initially measure lease liabilities at the present value of the remaining lease payments over the lease term. Options to extend or terminate the lease are included only when it is reasonably certain that we will exercise that option. As most of our leases do not provide enough information to determine an implicit interest rate, we generally use a portfolio level incremental borrowing rate in our present value calculation. We initially measure ROU assets at the value of the lease liability, plus any initial direct costs and prepaid lease payments, less any lease incentives received.

With respect to our finance leases, (i) ROU assets are generally depreciated on a straight-line basis over the shorter of the lease term or the useful life of the asset and (ii) interest expense on the lease liability is recorded using the effective interest method. Operating lease expense is recognized on a straight-line basis over the lease term. For leases with a term of 12 months or less (short-term leases), we do not recognize ROU assets or lease liabilities. Short-term lease expense is recognized on a straight-line basis over the lease term.