Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Contingency [Line Items]
Estimated annual effective tax rate			27.50%	25.50%
Effective tax rate	51.70%	23.10%	36.00%	21.20%
Net tax expense incurred in connection with equity method transaction	$ 261		$ 261
Effective tax rate, excluding effects of equity method investment transaction	12.10%		16.80%
Net discrete tax benefit	$ 72	$ 8	$ 100	$ 71
Net benefit from the release of uncertain tax positions due to the expirations of statutes of limitations and audit settlements	$ 70	24	70	$ 84
Tax expense from U.S. state legislative changes		$ 15
Foreign Tax Authority | China
Income Tax Contingency [Line Items]
Net benefit from the release of uncertain tax positions due to the expirations of statutes of limitations and audit settlements			$ 24