New Accounting Pronouncements	6 Months Ended
Jun. 30, 2018
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements Revenue Recognition – In May 2014, the Financial Accounting Standards Board (the “FASB”) issued a new single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. We adopted this new guidance on January 1, 2018. See Note 4, Revenue Recognition, for further information about our transition to this new revenue recognition model using the modified retrospective transition method. Lease Accounting – In February 2016, the FASB issued new guidance on leases. The new guidance requires lessees to recognize on the balance sheet the assets and liabilities for the rights and obligations created by finance and operating leases with lease terms of more than 12 months, amends various other aspects of accounting for leases by lessees and lessors, and requires enhanced disclosures. The new guidance is effective commencing in 2019 and requires either a modified retrospective transition approach with application in all comparative periods presented, or an alternative transition method, which permits a company to use its effective date as the date of initial application without restating comparative period financial statements. The new guidance also provides several practical expedients and policies that companies may elect under either transition method. We currently expect to apply the alternative transition method and elect the package of practical expedients under which we will not reassess the classification of our existing leases, reevaluate whether any expired or existing contracts are or contain leases or reassess initial direct costs under the new guidance. We do not expect to elect the practical expedient that permits a reassessment of lease terms for existing leases and are continuing to evaluate other practical expedients and elections specified in the new guidance. We have commenced an analysis of the impact of the new lease guidance and developed a comprehensive plan for our implementation of the new guidance. The project plan includes analyzing the impact of the new guidance on our current lease contracts, reviewing the completeness of our existing lease portfolio, comparing our accounting policies under current accounting guidance to the new accounting guidance and identifying potential differences from applying the requirements of the new guidance to our lease contracts. Under current accounting guidance for leases, we do not recognize an asset or liability created by operating leases where we are the lessee. We expect a material increase to our assets and liabilities on our consolidated balance sheet as a result of recognizing assets and liabilities for operating leases where we are the lessee on the date of initial application of the new guidance. We are continuing to evaluate the impact of the new guidance on capital leases and direct finance leases. We are also continuing to evaluate the impact that adoption of this guidance will have on our consolidated statements of operations. We do not expect the adoption of this new guidance to have a material impact on the amount or timing of our cash flows and liquidity. Goodwill Impairment – In January 2017, the FASB issued guidance to simplify how an entity measures goodwill impairment by removing the second step of the two-step quantitative goodwill impairment test. An entity will no longer be required to perform a hypothetical purchase price allocation to measure goodwill impairment. Instead, impairment will be measured at the amount by which the carrying value exceeds the fair value of a reporting unit; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The amendment requires prospective adoption and is effective commencing in 2020 with early adoption permitted. Hedge Accounting – In August 2017, the FASB issued guidance to improve the transparency and understandability of information conveyed to financial statement users about an entity's risk management activities and to simplify the application of hedge accounting by preparers. We adopted this guidance on January 1, 2018 (the “Adoption Date”). The new guidance eliminates the requirement to separately measure and report hedge ineffectiveness for cash flow and net investment hedges that are deemed effective. Most notably, for our cross-currency swaps designated as net investment hedges, the new guidance permits the exclusion of the interest component (the “Excluded Component”) from the accounting hedge without affecting net investment hedge designation. The initial value of the Excluded Component may be recognized in earnings on a systematic and rational basis over the life of the derivative instrument. Subsequent to the Adoption Date, we changed the method of assessing effectiveness for net investment hedges using derivatives from the forward method to the spot method. We de-designated the cross currency-swaps and re-designated them as of March 15, 2018 (the "Re-designation Date"). As a result of adopting the new guidance and the re-designation of our cross- currency-swaps, we will recognize a benefit from the amortization of the initial value of the Excluded Component as a component of Interest expense, net in our condensed consolidated statements of operations rather than as a component of other comprehensive income. All changes in fair value of the instruments related to currency fluctuations will continue to be recognized within other comprehensive income. The impact of adoption did not have a material effect on our Financial Statements as of the Adoption Date. We recorded a $19.9 million net benefit to Interest expense, net during the three months ended June 30, 2018 and a $23.5 million net benefit to Interest expense, net from the Re-designation Date through June 30, 2018 in our condensed consolidated statements of operations for the amortization of the initial value of the Excluded Component, as described above. We believe the new guidance better portrays the economic results of our risk management activities and net investment hedges in our Financial Statements. Reclassification of Certain Tax Effects – In February 2018, the FASB issued guidance which allows a reclassification from accumulated other comprehensive income to retained earnings for the tax effects of certain items within accumulated other comprehensive income. The amendment is effective commencing in 2019 with early adoption permitted. We are currently evaluating the impact that the adoption of this new guidance will have on our Financial Statements. Share-based payment arrangements with nonemployees – In June 2018, the FASB issued guidance which simplifies the accounting for share-based payments granted to nonemployees for goods and services. Most of the guidance on such payments to nonemployees would be aligned with the requirements for share-based payments granted to employees. The amendment is effective commencing in 2019 with early adoption permitted. We are currently evaluating the impact that the adoption of this new guidance will have on our Financial Statements.

New Accounting Pronouncements

Revenue Recognition – In May 2014, the Financial Accounting Standards Board (the “FASB”) issued a new single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. We adopted this new guidance on January 1, 2018. See Note 4, Revenue Recognition, for further information about our transition to this new revenue recognition model using the modified retrospective transition method.

Lease Accounting – In February 2016, the FASB issued new guidance on leases. The new guidance requires lessees to recognize on the balance sheet the assets and liabilities for the rights and obligations created by finance and operating leases with lease terms of more than 12 months, amends various other aspects of accounting for leases by lessees and lessors, and requires enhanced disclosures. The new guidance is effective commencing in 2019 and requires either a modified retrospective transition approach with application in all comparative periods presented, or an alternative transition method, which permits a company to use its effective date as the date of initial application without restating comparative period financial statements. The new guidance also provides several practical expedients and policies that companies may elect under either transition method. We currently expect to apply the alternative transition method and elect the package of practical expedients under which we will not reassess the classification of our existing leases, reevaluate whether any expired or existing contracts are or contain leases or reassess initial direct costs under the new guidance. We do not expect to elect the practical expedient that permits a reassessment of lease terms for existing leases and are continuing to evaluate other practical expedients and elections specified in the new guidance.

We have commenced an analysis of the impact of the new lease guidance and developed a comprehensive plan for our implementation of the new guidance. The project plan includes analyzing the impact of the new guidance on our current lease contracts, reviewing the completeness of our existing lease portfolio, comparing our accounting policies under current accounting guidance to the new accounting guidance and identifying potential differences from applying the requirements of the new guidance to our lease contracts. Under current accounting guidance for leases, we do not recognize an asset or liability created by operating leases where we are the lessee. We expect a material increase to our assets and liabilities on our consolidated balance sheet as a result of recognizing assets and liabilities for operating leases where we are the lessee on the date of initial application of the new guidance. We are continuing to evaluate the impact of the new guidance on capital leases and direct finance leases. We are also continuing to evaluate the impact that adoption of this guidance will have on our consolidated statements of operations. We do not expect the adoption of this new guidance to have a material impact on the amount or timing of our cash flows and liquidity.

Goodwill Impairment – In January 2017, the FASB issued guidance to simplify how an entity measures goodwill impairment by removing the second step of the two-step quantitative goodwill impairment test. An entity will no longer be required to perform a hypothetical purchase price allocation to measure goodwill impairment. Instead, impairment will be measured at the amount by which the carrying value exceeds the fair value of a reporting unit; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The amendment requires prospective adoption and is effective commencing in 2020 with early adoption permitted.

Hedge Accounting – In August 2017, the FASB issued guidance to improve the transparency and understandability of information conveyed to financial statement users about an entity's risk management activities and to simplify the application of hedge accounting by preparers. We adopted this guidance on January 1, 2018 (the “Adoption Date”).

The new guidance eliminates the requirement to separately measure and report hedge ineffectiveness for cash flow and net investment hedges that are deemed effective. Most notably, for our cross-currency swaps designated as net investment hedges, the new guidance permits the exclusion of the interest component (the “Excluded Component”) from the accounting hedge without affecting net investment hedge designation. The initial value of the Excluded Component may be recognized in earnings on a systematic and rational basis over the life of the derivative instrument.

Subsequent to the Adoption Date, we changed the method of assessing effectiveness for net investment hedges using derivatives from the forward method to the spot method. We de-designated the cross currency-swaps and re-designated them as of March 15, 2018 (the "Re-designation Date"). As a result of adopting the new guidance and the re-designation of our cross- currency-swaps, we will recognize a benefit from the amortization of the initial value of the Excluded Component as a component of Interest expense, net in our condensed consolidated statements of operations rather than as a component of other comprehensive income. All changes in fair value of the instruments related to currency fluctuations will continue to be recognized within other comprehensive income.

The impact of adoption did not have a material effect on our Financial Statements as of the Adoption Date. We recorded a $19.9 million net benefit to Interest expense, net during the three months ended June 30, 2018 and a $23.5 million net benefit to Interest expense, net from the Re-designation Date through June 30, 2018 in our condensed consolidated statements of operations for the amortization of the initial value of the Excluded Component, as described above. We believe the new guidance better portrays the economic results of our risk management activities and net investment hedges in our Financial Statements.

Reclassification of Certain Tax Effects – In February 2018, the FASB issued guidance which allows a reclassification from accumulated other comprehensive income to retained earnings for the tax effects of certain items within accumulated other comprehensive income. The amendment is effective commencing in 2019 with early adoption permitted. We are currently evaluating the impact that the adoption of this new guidance will have on our Financial Statements.

Share-based payment arrangements with nonemployees – In June 2018, the FASB issued guidance which simplifies the accounting for share-based payments granted to nonemployees for goods and services. Most of the guidance on such payments to nonemployees would be aligned with the requirements for share-based payments granted to employees. The amendment is effective commencing in 2019 with early adoption permitted. We are currently evaluating the impact that the adoption of this new guidance will have on our Financial Statements.