Fair Value Disclosures - Fair Value of Financial Assets and Financial Liabilities (Detail) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents	[1]	$ 14,037	$ 8,736
Long-term borrowings		12,370	7,918
Carrying Amount [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents		14,037	8,736
Other assets		87	80
Carrying Amount [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings		12,370	7,918
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents		14,037	8,736
Other assets		87	80
Estimated Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings		$ 12,279	$ 7,413

[1] At September 30, 2024, cash and cash equivalents, investments, other assets and other liabilities include $140 million, $5.8 billion, $82 million, and $2.2 billion, respectively, related to consolidated variable interest entities (“VIEs”). At December 31, 2023, cash and cash equivalents, investments, other assets and other liabilities include $234 million, $5.0 billion, $83 million, and $2.2 billion, respectively, related to consolidated VIEs.