Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]
Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements. In January 2020, the Financial Accounting Standards Board ("FASB") issued ASU 2020-01, "Investments—Equity Securities (Topic 321)," "Investments—Equity Method and Joint Ventures (Topic 323)," and "Derivatives and Hedging (Topic 815): Clarifying the Interactions between Topic 321, Topic 323, and Topic 815," which clarifies that an entity should consider observable transactions when either applying or discontinuing the equity method of accounting for the purposes of applying the measurement alternative in accordance with Topic 321. ASU 2020-01 clarifies that for certain forward contracts or purchased options to acquire investments, an entity should not consider whether, upon settlement of the forward contract or exercise of the purchased option, the underlying securities would be accounted for under the equity method or the fair value option. We adopted ASU 2020-01 prospectively beginning on January 1, 2021. The adoption of the standard did not have a material effect on our financial position or results of operations.

Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements

Recently Adopted Accounting Pronouncements. In January 2020, the Financial Accounting Standards Board ("FASB") issued ASU 2020-01, "Investments—Equity Securities (Topic 321)," "Investments—Equity Method and Joint Ventures (Topic 323)," and "Derivatives and Hedging (Topic 815): Clarifying the Interactions between Topic 321, Topic 323, and Topic 815," which clarifies that an entity should consider observable transactions when either applying or discontinuing the equity method of accounting for the purposes of applying the measurement alternative in accordance with Topic 321. ASU 2020-01 clarifies that for certain forward contracts or purchased options to acquire investments, an entity should not consider whether, upon settlement of the forward contract or exercise of the purchased option, the underlying securities would be accounted for under the equity method or the fair value option. We adopted ASU 2020-01 prospectively beginning on January 1, 2021. The adoption of the standard did not have a material effect on our financial position or results of operations.