Stockholders' Equity - New Accounting Pronouncements (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity	$ 31,729	$ 32,114	$ 31,921	$ 31,838
Additional paid-in capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity	$ 41,190	$ 41,673	41,806	$ 41,756
Impact of Adoption of ASU
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity			(11)
Impact of Adoption of ASU | Additional paid-in capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity			(11)
Impact of Adoption of ASU | Accounting Standards Update 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized debt discount			14
Impact of Adoption of ASU | Accounting Standards Update 2020-06 | Additional paid-in capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity			$ (11)