Equity Method Investments - Basis Difference (Details) - MLU B.V. $ in Millions	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Basis difference	$ 658
Equity method goodwill
Schedule of Equity Method Investments [Line Items]
Basis difference	806
Intangible assets, net of accumulated amortization
Schedule of Equity Method Investments [Line Items]
Basis difference	87
Deferred tax liabilities
Schedule of Equity Method Investments [Line Items]
Basis difference	(19)
Cumulative currency translation adjustments
Schedule of Equity Method Investments [Line Items]
Basis difference	$ (216)