Parent Company (Details 1) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 21,503	$ 32,359	$ 23,932
Other assets	17,244	17,679
Total assets	188,548	191,367	198,000
Liabilities and Shareholders’ Equity
Long-term debt	38,675	42,952
Total liabilities	166,371	168,383
Shareholders’ Equity
Total shareholders’ equity	22,177	22,984	$ 23,071	$ 22,290
Total liabilities and shareholders’ equity	188,548	191,367
Parent Company
Assets
Cash and cash equivalents	5,341	10,968
Equity in net assets of subsidiaries and affiliates	22,623	23,306
Loans to subsidiaries and affiliates	17,848	15,887
Due from subsidiaries and affiliates	1,207	1,084
Other assets	158	164
Total assets	47,177	51,409
Liabilities and Shareholders’ Equity
Accounts payable and other liabilities	2,107	1,743
Due to subsidiaries and affiliates	443	1,100
Debt with subsidiaries and affiliates	136	2,772
Long-term debt	22,314	22,810
Total liabilities	25,000	28,425
Shareholders’ Equity
Total shareholders’ equity	22,177	22,984
Total liabilities and shareholders’ equity	$ 47,177	$ 51,409