Basis of Presentation - Noncontrolling Interest (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Goodwill impairment	$ 110	$ 0
Preferred stock dividend rate	6.50%
Non-controlling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Goodwill impairment	$ 72

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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