Schedule I (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Cash Dividends Paid to Parent, Consolidated Subsidiaries	$ 8,000	$ 8,800
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash Dividends Paid to Parent, Consolidated Subsidiaries	18,500	15,600	$ 10,800
Return of capital to parent company	639	1,424	$ 245
Notes Payable	9,900	8,700
Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Other Long-term Debt	$ 1,100	$ 900