SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Impact from Adoption to Shareholder's Equity (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Total shareholders’ equity	$ 19,784	$ 20,140	$ 17,560	$ 17,031		$ 33,559
Common Stock [Member]
Total shareholders’ equity	135	135	135	135		135
Additional paid-in capital
Total shareholders’ equity	2,665	2,641	2,560	2,529		2,410
Retained earnings
Total shareholders’ equity	45,555	44,367	42,010	40,963		37,984
Accumulated other comprehensive income (loss)
Total shareholders’ equity	(7,278)	(6,429)	(8,451)	(8,411)		8,934
Treasury Stock, Common
Total shareholders’ equity	$ (21,293)	$ (20,574)	$ (18,694)	$ (18,185)		$ (15,904)
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment
Total shareholders’ equity					$ (18,894)
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Common Stock [Member]
Total shareholders’ equity					0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Additional paid-in capital
Total shareholders’ equity					0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Retained earnings
Total shareholders’ equity					(324)
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Accumulated other comprehensive income (loss)
Total shareholders’ equity					(18,570)
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Treasury Stock, Common
Total shareholders’ equity					0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance
Total shareholders’ equity					14,665
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Common Stock [Member]
Total shareholders’ equity					135
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Additional paid-in capital
Total shareholders’ equity					2,410
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Retained earnings
Total shareholders’ equity					37,660
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Accumulated other comprehensive income (loss)
Total shareholders’ equity					(9,636)
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Treasury Stock, Common
Total shareholders’ equity					$ (15,904)