Recently Issued Accounting Standards (Notes)	6 Months Ended
Jun. 30, 2017
Recently Issued Accounting Standards [Abstract]
Recently Issued Accounting Standards	Recently Issued Accounting Standards Accounting Standards Adopted January 1, 2017 In March 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting, which includes multiple provisions intended to simplify various aspects of the accounting for share-based payments. The new standard (1) requires all excess tax benefits and deficiencies to be recognized as income tax expense or benefit in the income statement in the period in which they occur regardless of whether the benefit reduces taxes payable in the current period, (2) requires classification of excess tax benefits as an operating activity on the statements of cash flows, (3) allows an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur and (4) causes the threshold under which employee share-based awards partially settled in cash can qualify for equity classification to increase to the maximum statutory tax rates in the applicable jurisdiction. ASU 2016-09 will be effective for interim and annual periods after December 15, 2016 (January 1, 2017 for the Company). The new standard generally requires a modified retrospective transition through a cumulative-effect adjustment as of the beginning of the period of adoption, with certain provisions requiring either a prospective or retrospective transition. The Company adopted ASU 2016-09 on January 1, 2017. Upon adoption of ASU 2016-09, the Company recognized excess tax benefits of approximately $136 million in deferred tax assets that were previously not recognized in a cumulative-effect adjustment to retained earnings. The Company will prospectively record a deferred tax benefit or expense associated with the difference between book and tax for stock compensation expense. On January 1, 2017, the Company also established an accounting policy election to assume zero forfeitures for stock award grants and account for forfeitures when they occur which prospectively impacts stock compensation expense. Other aspects of adoption ASU 2016-09 did not have a material impact to the Company’s consolidated financial statements. In March 2017, the FASB issued ASU No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost ("ASU 2017-07"), which requires employers to report the service cost component of net periodic pension cost in the same line item as other compensation costs arising from services rendered during the period. The standard also requires the other components of net periodic cost be presented in the income statement separately from the service cost component and outside of a subtotal of income from operations. ASU 2017-07 will be effective for annual periods beginning after December 15, 2017, and early adoption is permitted. The new standard requires retrospective application and allows a practical expedient that permits an employer to use the amounts disclosed in its pension plan footnote for the prior comparative periods as the estimation basis for applying the retrospective presentation. The Company early adopted ASU 2017-07 on January 1, 2017 and utilized the practical expedient to estimate the impact on the prior comparative period information presented in interim and annual financial statements. The Company previously recorded service cost with other compensation costs in operating costs and expenses in the consolidated statements of operations, and recorded other pension costs (benefits), in other operating expenses, net. Adoption of the standard results in the reclassification of other pension costs (benefits) to other expenses, net (non-operating). Adopting the standard will reduce 2016 income from operations presented for comparative purposes in the 2017 annual financial statements by $899 million with a corresponding decrease to other expenses of $899 million, with no impact to net income. For both the three and six months ended June 30, 2016, the adoption of the standard resulted in reduction of income from operations by $520 million with a corresponding decrease to other expenses of $520 million, with no impact to net income. ASU 2017-07 does not impact the consolidated balance sheets or statements of cash flows. Accounting Standards Not Yet Adopted In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”), which is a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under U.S. GAAP. The new standard provides a single principles-based, five-step model to be applied to all contracts with customers, which steps are to (1) identify the contract(s) with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract and (5) recognize revenue when each performance obligation is satisfied. ASU 2014-09 will be effective for interim and annual periods beginning after December 15, 2017 (January 1, 2018 for the Company). Companies can transition to the standard either retrospectively or as a cumulative-effect adjustment as of the date of adoption. The Company is currently in the process of evaluating which method of transition will be utilized. The Company is continuing to assess all potential impacts that the adoption of ASU 2014-09 will have on its consolidated financial statements, however the adoption is not anticipated to have a material impact on the Company's financial position or results of operations. The adoption is anticipated to result in the deferral of residential installation revenues and enterprise commission expenses over a period of time instead of recognized immediately. The adoption is also anticipated to result in the reclassification to operating costs and expenses the amortization of up-front fees paid to market and serve customers who reside in residential multiple dwelling units (“MDUs”) instead of amortized as an intangible to depreciation and amortization expense. In February 2016, the FASB issued ASU No. 2016-02, Leases (“ASU 2016-02”), which requires lessees to recognize almost all leases on their balance sheet as a right-of-use asset and a lease liability. Lessees are allowed to account for short-term leases (i.e., leases with a term of 12 months or less) off-balance sheet, consistent with current operating lease accounting. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. ASU 2016-02 will be effective for interim and annual periods beginning after December 15, 2018 (January 1, 2019 for the Company). The new standard requires a modified retrospective transition through a cumulative-effect adjustment as of the beginning of the earliest period presented in the financial statements. The Company is currently in the process of evaluating the impact that the adoption of ASU 2016-02 will have on its consolidated financial statements including identifying the population of leases, evaluating technology solutions and collecting lease data. In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”), which clarifies how entities should classify cash receipts and cash payments related to eight specific cash flow matters on the statement of cash flows, with the objective of reducing existing diversity in practice. ASU 2016-15 will be effective for interim and annual periods beginning after December 15, 2017 (January 1, 2018 for the Company). Early adoption is permitted. The Company is currently in the process of evaluating the impact that the adoption of ASU 2016-15 will have on its consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which eliminates step two from the goodwill impairment test. Under the new standard, to the extent the carrying amount of a reporting unit exceeds the fair value, the Company will record an impairment charge equal to the difference. The impairment charge recognized should not exceed the total amount of goodwill allocated to the reporting unit. ASU 2017-04 will be effective for interim and annual periods beginning after December 15, 2019 (January 1, 2020 for the Company). Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. The Company is currently in the process of evaluating the impact that the adoption of ASU 2017-04 will have on its consolidated financial statements. In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting ("ASU 2017-09"), which amends the scope of modification accounting for share-based payment arrangements. The ASU provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting. ASU 2017-09 will be applied prospectively to awards modified on or after the effective date. ASU 2017-09 will be effective for interim and annual periods beginning after December 15, 2017 (January 1, 2018 for the Company). Early adoption is permitted. The Company is currently in the process of evaluating the impact that the adoption of ASU 2017-09 will have on its consolidated financial statements.

Recently Issued Accounting Standards

Accounting Standards Adopted January 1, 2017

In March 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting, which includes multiple provisions intended to simplify various aspects of the accounting for share-based payments. The new standard (1) requires all excess tax benefits and deficiencies to be recognized as income tax expense or benefit in the income statement in the period in which they occur regardless of whether the benefit reduces taxes payable in the current period, (2) requires classification of excess tax benefits as an operating activity on the statements of cash flows, (3) allows an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur and (4) causes the threshold under which employee share-based awards partially settled in cash can qualify for equity classification to increase to the maximum statutory tax rates in the applicable jurisdiction. ASU 2016-09 will be effective for interim and annual periods after December 15, 2016 (January 1, 2017 for the Company). The new standard generally requires a modified retrospective transition through a cumulative-effect adjustment as of the beginning of the period of adoption, with certain provisions requiring either a prospective or retrospective transition. The Company adopted ASU 2016-09 on January 1, 2017. Upon adoption of ASU 2016-09, the Company recognized excess tax benefits of approximately $136 million in deferred tax assets that were previously not recognized in a cumulative-effect adjustment to retained earnings. The Company will prospectively record a deferred tax benefit or expense associated with the difference between book and tax for stock compensation expense. On January 1, 2017, the Company also established an accounting policy election to assume zero forfeitures for stock award grants and account for forfeitures when they occur which prospectively impacts stock compensation expense. Other aspects of adoption ASU 2016-09 did not have a material impact to the Company’s consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost ("ASU 2017-07"), which requires employers to report the service cost component of net periodic pension cost in the same line item as other compensation costs arising from services rendered during the period. The standard also requires the other components of net periodic cost be presented in the income statement separately from the service cost component and outside of a subtotal of income from operations. ASU 2017-07 will be effective for annual periods beginning after December 15, 2017, and early adoption is permitted. The new standard requires retrospective application and allows a practical expedient that permits an employer to use the amounts disclosed in its pension plan footnote for the prior comparative periods as the estimation basis for applying the retrospective presentation. The Company early adopted ASU 2017-07 on January 1, 2017 and utilized the practical expedient to estimate the impact on the prior comparative period information presented in interim and annual financial statements. The Company previously recorded service cost with other compensation costs in operating costs and expenses in the consolidated statements of operations, and recorded other pension costs (benefits), in other operating expenses, net. Adoption of the standard results in the reclassification of other pension costs (benefits) to other expenses, net (non-operating). Adopting the standard will reduce 2016 income from operations presented for comparative purposes in the 2017 annual financial statements by $899 million with a corresponding decrease to other expenses of $899 million, with no impact to net income. For both the three and six months ended June 30, 2016, the adoption of the standard resulted in reduction of income from operations by $520 million with a corresponding decrease to other expenses of $520 million, with no impact to net income. ASU 2017-07 does not impact the consolidated balance sheets or statements of cash flows.

Accounting Standards Not Yet Adopted

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”), which is a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under U.S. GAAP. The new standard provides a single principles-based, five-step model to be applied to all contracts with customers, which steps are to (1) identify the contract(s) with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract and (5) recognize revenue when each performance obligation is satisfied. ASU 2014-09 will be effective for interim and annual periods beginning after December 15, 2017 (January 1, 2018 for the Company). Companies can transition to the standard either retrospectively or as a cumulative-effect adjustment as of the date of adoption. The Company is currently in the process of evaluating which method of transition will be utilized. The Company is continuing to assess all potential impacts that the adoption of ASU 2014-09 will have on its consolidated financial statements, however the adoption is not anticipated to have a material impact on the Company's financial position or results of operations. The adoption is anticipated to result in the deferral of residential installation revenues and enterprise commission expenses over a period of time instead of recognized immediately. The adoption is also anticipated to result in the reclassification to operating costs and expenses the amortization of up-front fees paid to market and serve customers who reside in residential multiple dwelling units (“MDUs”) instead of amortized as an intangible to depreciation and amortization expense.

In February 2016, the FASB issued ASU No. 2016-02, Leases (“ASU 2016-02”), which requires lessees to recognize almost all leases on their balance sheet as a right-of-use asset and a lease liability. Lessees are allowed to account for short-term leases (i.e., leases with a term of 12 months or less) off-balance sheet, consistent with current operating lease accounting. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. ASU 2016-02 will be effective for interim and annual periods beginning after December 15, 2018 (January 1, 2019 for the Company). The new standard requires a modified retrospective transition through a cumulative-effect adjustment as of the beginning of the earliest period presented in the financial statements. The Company is currently in the process of evaluating the impact that the adoption of ASU 2016-02 will have on its consolidated financial statements including identifying the population of leases, evaluating technology solutions and collecting lease data.

In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”), which clarifies how entities should classify cash receipts and cash payments related to eight specific cash flow matters on the statement of cash flows, with the objective of reducing existing diversity in practice. ASU 2016-15 will be effective for interim and annual periods beginning after December 15, 2017 (January 1, 2018 for the Company). Early adoption is permitted. The Company is currently in the process of evaluating the impact that the adoption of ASU 2016-15 will have on its consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which eliminates step two from the goodwill impairment test. Under the new standard, to the extent the carrying amount of a reporting unit exceeds the fair value, the Company will record an impairment charge equal to the difference. The impairment charge recognized should not exceed the total amount of goodwill allocated to the reporting unit. ASU 2017-04 will be effective for interim and annual periods beginning after December 15, 2019 (January 1, 2020 for the Company). Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. The Company is currently in the process of evaluating the impact that the adoption of ASU 2017-04 will have on its consolidated financial statements.

In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting ("ASU 2017-09"), which amends the scope of modification accounting for share-based payment arrangements. The ASU provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting. ASU 2017-09 will be applied prospectively to awards modified on or after the effective date. ASU 2017-09 will be effective for interim and annual periods beginning after December 15, 2017 (January 1, 2018 for the Company). Early adoption is permitted. The Company is currently in the process of evaluating the impact that the adoption of ASU 2017-09 will have on its consolidated financial statements.