Recently Issued Accounting Standards	3 Months Ended
Mar. 31, 2019
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Standards	Recent Accounting Standards Accounting Standards Effective as of January 1, 2019 In February 2016, the Financial Accounting Standards Board ("FASB") issued new accounting guidance on leases, ASU No. 2016-02, Leases (Topic 842), which we adopted on January 1, 2019. The new guidance requires that a lessee recognize ROU assets and lease liabilities on the balance sheet for leases with lease terms longer than 12 months. The recognition, measurement and presentation of lease expenses and cash flows depend on the classification by the lessee as a finance or operating lease. We determined that no cumulative effect adjustment to retained earnings was necessary upon adoption. As of the transition date, the ROU asset and total lease liability (current and long-term) were $458.1 and $458.7, respectively. We elected the package of three practical expedients which lessened the transitional burden of implementing the new guidance. Accordingly, we did not reassess: 1) whether any expired or existing contracts are or contain leases; 2) the lease classification for any expired or existing leases; or 3) the initial direct costs for any existing leases. We have elected the practical expedient to not separate lease and non-lease components. In August 2017, the FASB issued new guidance on hedge accounting. The amendments in this guidance include the elimination of the concept of recognizing periodic hedge ineffectiveness for cash flow and net investment hedges, recognition and presentation of changes in the fair value of the hedging instrument, recognition and presentation of components excluded from an entity's hedge effectiveness assessment, addition of the ability to elect to perform subsequent effectiveness assessments qualitatively, and addition of new disclosure requirements. We adopted this guidance effective January 1, 2019. There was no impact of this adoption on our Consolidated Financial Statements. See Note 14 for the modified disclosures. In February 2018, the FASB issued new guidance on reporting comprehensive income. The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the United States Tax Cuts and Jobs Act of 2017 ("Tax Act"). The guidance was effective for us as of January 1, 2019. We elected not to adopt this optional reclassification. In June 2018, the FASB issued new guidance on the accounting for share-based payment awards. The guidance makes the accounting for share-based payment awards issued to nonemployees largely consistent with the accounting for share-based payment awards issued to employees. We adopted this guidance effective January 1, 2019. There was no impact of this adoption on our Consolidated Financial Statements. Recently Issued Accounting Standards In August 2018, the FASB issued new guidance on disclosures related to fair value measurements. The guidance is intended to improve the effectiveness of the notes to financial statements by facilitating clearer communication, and it includes multiple new, eliminated and modified disclosure requirements. The guidance is effective for us in 2020. The adoption of this guidance will have no impact on our Consolidated Financial Statements. In August 2018, the FASB issued new guidance on the accounting for internal-use software. The guidance aligns the accounting for costs incurred to implement a cloud computing arrangement that is a service arrangement with the guidance on capitalizing costs associated with developing or obtaining internal-use software. The guidance is effective for us in 2020. We are assessing the impact of the adoption of this guidance on our Consolidated Financial Statements. In August 2018, the FASB issued new guidance on disclosures related to defined benefit plans. The guidance amends the current disclosure requirements to add, remove and clarify disclosure requirements for defined benefit pension and other postretirement plans. The guidance is effective for us in 2021. The adoption of this guidance will have no impact on our Consolidated Financial Statements.

Recent Accounting Standards

Accounting Standards Effective as of January 1, 2019

In February 2016, the Financial Accounting Standards Board ("FASB") issued new accounting guidance on leases, ASU No. 2016-02, Leases (Topic 842), which we adopted on January 1, 2019. The new guidance requires that a lessee recognize ROU assets and lease liabilities on the balance sheet for leases with lease terms longer than 12 months. The recognition, measurement and presentation of lease expenses and cash flows depend on the classification by the lessee as a finance or operating lease. We determined that no cumulative effect adjustment to retained earnings was necessary upon adoption. As of the transition date, the ROU asset and total lease liability (current and long-term) were $458.1 and $458.7, respectively.

We elected the package of three practical expedients which lessened the transitional burden of implementing the new guidance. Accordingly, we did not reassess: 1) whether any expired or existing contracts are or contain leases; 2) the lease classification for any expired or existing leases; or 3) the initial direct costs for any existing leases. We have elected the practical expedient to not separate lease and non-lease components.

In August 2017, the FASB issued new guidance on hedge accounting. The amendments in this guidance include the elimination of the concept of recognizing periodic hedge ineffectiveness for cash flow and net investment hedges, recognition and presentation of changes in the fair value of the hedging instrument, recognition and presentation of components excluded from an entity's hedge effectiveness assessment, addition of the ability to elect to perform subsequent effectiveness assessments qualitatively, and addition of new disclosure requirements. We adopted this guidance effective January 1, 2019. There was no impact of this adoption on our Consolidated Financial Statements. See Note 14 for the modified disclosures.

In February 2018, the FASB issued new guidance on reporting comprehensive income. The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the United States Tax Cuts and Jobs Act of 2017 ("Tax Act"). The guidance was effective for us as of January 1, 2019. We elected not to adopt this optional reclassification.

In June 2018, the FASB issued new guidance on the accounting for share-based payment awards. The guidance makes the accounting for share-based payment awards issued to nonemployees largely consistent with the accounting for share-based payment awards issued to employees. We adopted this guidance effective January 1, 2019. There was no impact of this adoption on our Consolidated Financial Statements.

Recently Issued Accounting Standards

In August 2018, the FASB issued new guidance on disclosures related to fair value measurements. The guidance is intended to improve the effectiveness of the notes to financial statements by facilitating clearer communication, and it includes multiple new, eliminated and modified disclosure requirements. The guidance is effective for us in 2020. The adoption of this guidance will have no impact on our Consolidated Financial Statements.

In August 2018, the FASB issued new guidance on the accounting for internal-use software. The guidance aligns the accounting for costs incurred to implement a cloud computing arrangement that is a service arrangement with the guidance on capitalizing costs associated with developing or obtaining internal-use software. The guidance is effective for us in 2020. We are assessing the impact of the adoption of this guidance on our Consolidated Financial Statements.

In August 2018, the FASB issued new guidance on disclosures related to defined benefit plans. The guidance amends the current disclosure requirements to add, remove and clarify disclosure requirements for defined benefit pension and other postretirement plans. The guidance is effective for us in 2021. The adoption of this guidance will have no impact on our Consolidated Financial Statements.