New Accounting Standards	12 Months Ended
Dec. 31, 2018
New Accounting Standards [Abstract]
New Accounting Standards	New Accounting Standards On January 1, 2019, we will adopt ASC 842, which requires that all right-of-use assets and related lease liabilities are recorded on the balance sheet. As permitted by ASC 842, we elected the adoption date of January 1, 2019, which is the date of initial application. As a result, the consolidated balance sheet prior to January 1, 2019 will not be restated and will continue to be reported under ASC Topic 840, Leases, or ASC 840. Under ASC 842, all leases are classified as either operating leases or finance leases. The lease classification affects the expense recognition in the income statement. Operating lease expense is recorded in operating expenses and finance lease expense is recorded as amortization of the right-of-use asset and interest expense. We will adopt ASC 842 using a modified retrospective approach for all leases existing at January 1, 2019. Substantially all our real estate leases are operating leases. Accordingly, the adoption of ASC 842 will have a material impact on our consolidated balance sheet, but will not have any impact on our consolidated income statement. The most significant impact will be the recognition of the right-of-use asset and the lease liability for operating leases. The accounting for finance leases (capital leases) is substantially unchanged. Upon adoption, leases that were classified as operating leases under ASC 840 will be classified as operating leases under ASC 842 and we will record right-of-use assets and the related lease liability. The lease liability will be based on the present value of the remaining minimum lease payments discounted using our secured incremental borrowing rate at the effective date of January 1, 2019 using the original lease term as the tenor. Based on current foreign exchange rates, the lease liability will be approximately $1.6 billion. As permitted under ASC 842, upon adoption we will elect a package of practical expedients that allows us not to reassess (1) whether a contract is or contains a lease, (2) the lease classification and (3) whether previously capitalized costs continue to qualify as initial indirect costs. The use of the package of practical expedients will not have a significant impact on the measurement of the operating lease liability. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments, or ASU 2016-13, which changes the impairment model for most financial assets. The new model uses a forward-looking expected loss method, which will generally result in earlier recognition of allowances for losses. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019 and early adoption is permitted for annual and interim periods beginning after December 15, 2018. We will adopt ASU 2016-13 on January 1, 2020. However, we are not yet in a position to assess the impact of the new standard on our results of operations or financial position. In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income: Reclassification of Certain Tax effects from Accumulated Other Comprehensive Income, or ASU 2018-02, which requires the reclassification from accumulated other comprehensive income to retained earnings for the stranded tax effects arising from the change in the reduction of the U.S. federal statutory income tax rate to 21% from 35%. The tax effects of items included in accumulated comprehensive income at December 31, 2017 do not reflect the appropriate tax rate. ASU 2018-02 is effective for interim and annual periods beginning after December 15, 2018. We will adopt ASU 2018-02 on January 1, 2019. The adoption of ASU 2018-02 will result in an immaterial reclassification between accumulated other comprehensive income and retained earnings, and will have no impact on our results of operations or financial position. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other, Internal-Use Software, or ASU 2018-15, which aligns the accounting for implementation costs incurred in a cloud computing arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. ASU 2018-15 is effective for annual and interim periods beginning after December 15, 2019 and early adoption is permitted at any interim period. ASU 2018-15 may be adopted either on a prospective basis upon early adoption or the effective date for implementation costs for new or existing arrangements incurred on or after the adoption date, or on a full retrospective basis to the earliest period presented. We are not yet in a position to assess the adoption date or the adoption method or to assess impact of the new standard on our results of operations or financial position.

New Accounting Standards

On January 1, 2019, we will adopt ASC 842, which requires that all right-of-use assets and related lease liabilities are recorded on the balance sheet. As permitted by ASC 842, we elected the adoption date of January 1, 2019, which is the date of initial application. As a result, the consolidated balance sheet prior to January 1, 2019 will not be restated and will continue to be reported under ASC Topic 840, Leases, or ASC 840. Under ASC 842, all leases are classified as either operating leases or finance leases. The lease classification affects the expense recognition in the income statement. Operating lease expense is recorded in operating expenses and finance lease expense is recorded as amortization of the right-of-use asset and interest expense.

We will adopt ASC 842 using a modified retrospective approach for all leases existing at January 1, 2019. Substantially all our real estate leases are operating leases. Accordingly, the adoption of ASC 842 will have a material impact on our consolidated balance sheet, but will not have any impact on our consolidated income statement. The most significant impact will be the recognition of the right-of-use asset and the lease liability for operating leases. The accounting for finance leases (capital leases) is substantially unchanged. Upon adoption, leases that were classified as operating leases under ASC 840 will be classified as operating leases under ASC 842 and we will record right-of-use assets and the related lease liability. The lease liability will be based on the present value of the remaining minimum lease payments discounted using our secured incremental borrowing rate at the effective date of January 1, 2019 using the original lease term as the tenor. Based on current foreign exchange rates, the lease liability will be approximately $1.6 billion.

As permitted under ASC 842, upon adoption we will elect a package of practical expedients that allows us not to reassess (1) whether a contract is or contains a lease, (2) the lease classification and (3) whether previously capitalized costs continue to qualify as initial indirect costs. The use of the package of practical expedients will not have a significant impact on the measurement of the operating lease liability.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments, or ASU 2016-13, which changes the impairment model for most financial assets. The new model uses a forward-looking expected loss method, which will generally result in earlier recognition of allowances for losses. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019 and early adoption is permitted for annual and interim periods beginning after December 15, 2018. We will adopt ASU 2016-13 on January 1, 2020. However, we are not yet in a position to assess the impact of the new standard on our results of operations or financial position.

In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income: Reclassification of Certain Tax effects from Accumulated Other Comprehensive Income, or ASU 2018-02, which requires the reclassification from accumulated other comprehensive income to retained earnings for the stranded tax effects arising from the change in the reduction of the U.S. federal statutory income tax rate to 21% from 35%. The tax effects of items included in accumulated comprehensive income at December 31, 2017 do not reflect the appropriate tax rate. ASU 2018-02 is effective for interim and annual periods beginning after December 15, 2018. We will adopt ASU 2018-02 on January 1, 2019. The adoption of ASU 2018-02 will result in an immaterial reclassification between accumulated other comprehensive income and retained earnings, and will have no impact on our results of operations or financial position.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other, Internal-Use Software, or ASU 2018-15, which aligns the accounting for implementation costs incurred in a cloud computing arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. ASU 2018-15 is effective for annual and interim periods beginning after December 15, 2019 and early adoption is permitted at any interim period. ASU 2018-15 may be adopted either on a prospective basis upon early adoption or the effective date for implementation costs for new or existing arrangements incurred on or after the adoption date, or on a full retrospective basis to the earliest period presented. We are not yet in a position to assess the adoption date or the adoption method or to assess impact of the new standard on our results of operations or financial position.