Schedule I - Condensed Financial Information of Parent - Condensed Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 12,107	$ 12,221
Receivables from subsidiaries	3,253	2,229
Other current assets	454	696
Total current assets	17,034	15,798
Investment in subsidiaries	440	2,789
Other assets, net	940	824
Total assets	24,342	25,361
Current liabilities:
Accounts payable	3,480	2,507
Accrued expenses and other current liabilities	4,635	3,244
Short-term debt	1,961	500
Total current liabilities	13,330	8,474
Other long-term liabilities	161	172
Long-term debt	12,223	11,985
Total liabilities	27,086	22,579
Commitments and contingencies
Stockholders' (deficit) equity:
Total stockholders' (deficit) equity	(2,744)	2,782	$ 6,178	$ 4,893
Total liabilities and stockholders' (deficit) equity	24,342	25,361
Parent Company
Current assets:
Cash and cash equivalents	1,752	4,110
Receivables from subsidiaries	106	23
Other current assets	22	17
Total current assets	1,880	4,150
Loans receivable from subsidiaries	1,119	1,116
Investment in subsidiaries	10,294	11,651
Other assets, net	29	12
Total assets	13,322	16,929
Current liabilities:
Accounts payable	19	10
Accrued expenses and other current liabilities	336	207
Short-term debt	1,961	500
Total current liabilities	2,316	717
Loans payable to subsidiaries	1,404	1,290
Other long-term liabilities	123	155
Long-term debt	12,223	11,985
Total liabilities	16,066	14,147
Commitments and contingencies
Stockholders' (deficit) equity:
Total stockholders' (deficit) equity	(2,744)	2,782
Total liabilities and stockholders' (deficit) equity	$ 13,322	$ 16,929