Summary of Significant Accounting Policies - Supplemental Cash Flow (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments
Interest, net of capitalized interest		$ 447	$ 348	$ 387
Income taxes		636	736	370
Non-cash financing activities		276	225	$ 30
Non-cash acquisition consideration		$ 25	$ 135
2017 Audit [Member]
Investments
Income tax deposit paid	$ 103