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Recent Accounting Pronouncements
12 Months Ended
Dec. 31, 2020
Accounting Changes and Error Corrections [Abstract]  
Recent Accounting Pronouncements Recent Accounting Pronouncements
Accounting for Income Taxes
In December 2019, the Financial Accounting Standards Board ("FASB") issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes ("Topic 740"). This ASU simplifies various areas related to the accounting for income taxes by removing certain exceptions to the general principles and by amending the existing guidance in order to improve consistency in application. This ASU is effective for the Company beginning in the first quarter of 2021 and allows for early adoption.

On January 1, 2021, the Company adopted the updated Topic 740 in accordance with the applicable transition methods. Among the various updates, the Company adopted the accounting for ownership changes when transitioning from equity method to consolidation on a modified retrospective basis, which resulted in a $19 million adjustment to retained earnings as of January 1, 2021 for the cumulative effect of derecognizing the deferred tax liability related to the UK acquisition. For additional information regarding the deferred tax liability previously recognized for the UK acquisition, see Note 11 (Income Taxes). The remaining components of the updated Topic 740 did not have an impact to the Company’s Consolidated Financial Statements.

Reference Rate Reform
In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. Topic 848 temporarily provides optional expedients and exceptions for applying existing guidance to contract modifications, hedging relationships and other transactions that are expected to be affected by reference rate reform. Topic 848 was effective upon issuance and will remain in effect for all contract modifications and hedging relationships entered into through December 31, 2022. The adoption of Topic 848, along with the related expedients, did not have an impact to the Company’s Consolidated Financial Statements.

Measurement of Credit Losses on Financial Instruments
On January 1, 2020, the Company adopted and applied Topic 326 using the modified retrospective approach. Topic 326 introduced a forward-looking approach based on expected losses to estimate credit losses on certain types of financial instruments, including trade receivables, which is reflected in the Company’s policies. The adoption of Topic
326, as well as the adjustment to retained earnings for the cumulative effect, was not significant to the Company's Consolidated Financial Statements.