Investments - Investment Segment - Summarized Financial Information (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Net sales	$ 1,325		$ 2,588		$ 3,186	$ 4,888
Cost of goods sold	1,135		2,129		2,944	4,029
Other revenues from operations	136		172		297	334
Other expenses from operations	107		137		242	268
Net income (loss)	864	$ (2,306)	(597)	$ (664)	(1,442)	(1,261)
Net income (loss) attributable to shareholders	$ 299		$ (498)		(1,085)	(892)
Herbalife
Net sales					2,609	2,412
Cost of goods sold					518	485
Net income (loss)					161	173
Net income (loss) attributable to shareholders					161	173
Hertz
Other revenues from operations					2,755	4,618
Other expenses from operations					3,231	3,881
Net income (loss)					(1,209)	(107)
Net income (loss) attributable to shareholders					$ (1,203)	$ (108)