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Other Investments Other Investments (Notes)	3 Months Ended
Other Investments Other Investments (Notes)	Mar. 31, 2020
Other Investments [Abstract]
Cost and Equity Method Investments Disclosure [Text Block]	OTHER INVESTMENTS We have investments in entities for which we do not have the ability to exercise significant influence and fair values are not readily available. We record these investments at cost (less impairment, if any), adjusted for observable price changes in orderly transactions for the identical or a similar investment of the same issuer. We report the carrying value of these investments in Other assets in the non-current assets section of our consolidated balance sheet. These investments were $1.2 billion at both December 31, 2019 and March 31, 2020. In the first quarter of 2020, there were no material adjustments to the fair values of these investments held at March 31, 2020.