Investments and Other Assets (Equity Method Investee) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets [Abstract]
Current assets	$ 1,792	$ 3,205
Total assets	35,131	33,776
Liabilities [Abstract]
Current liabilities	9,401	8,573
Total liabilities	30,232	30,907
Income Statement [Abstract]
Net income (loss)	1,704	(2,156)	$ (5,260)
Affiliates
Assets [Abstract]
Current assets	528	658
Non-current assets	5,264	4,838
Total assets	5,792	5,496
Liabilities [Abstract]
Current liabilities	1,464	1,145
Non- current liabilities	2,907	3,381
Total liabilities	4,371	4,526
Income Statement [Abstract]
Total revenues	2,328	1,539	679
Total expenses	(1,857)	(1,416)	(897)
Net income (loss)	$ 471	$ 123	$ (218)