Fair Value Disclosures - Fair Value of Financial Assets and Financial Liabilities (Detail) - USD ($) $ in Millions		Mar. 31, 2025	Dec. 31, 2024
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents	[1]	$ 7,747	$ 12,762
Long-term borrowings		12,349	12,314
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		7,747	12,762
Other assets		108	86
Carrying Amount [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings		12,349	12,314
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		7,747	12,762
Other assets		108	86
Estimated Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings		$ 11,911	$ 11,680

[1] At March 31, 2025, cash and cash equivalents, investments, other assets and other liabilities include $282 million, $5.5 billion, $77 million and $2.1 billion, respectively, related to consolidated variable interest entities (“VIEs”). At December 31, 2024, cash and cash equivalents, investments, other assets and other liabilities include $125 million, $5.1 billion, $45 million and $2.1 billion, respectively, related to consolidated VIEs.