SUBSEQUENT EVENTS (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended
		Aug. 20, 2024	Aug. 17, 2024	Aug. 12, 2023	Aug. 17, 2024	Aug. 12, 2023	Sep. 13, 2024	Aug. 15, 2024
SUBSEQUENT EVENTS
Unamortized loss, net of tax	[1]		$ 123	$ (105)	$ 53	$ (196)
Unsecured revolving credit facility
SUBSEQUENT EVENTS
Unsecured revolving credit facility			$ 2,750		$ 2,750
ACI Notes
SUBSEQUENT EVENTS
Exchange offer								$ 7,442
Subsequent Events | Unsecured revolving credit facility
SUBSEQUENT EVENTS
Unsecured revolving credit facility							$ 5,000
Subsequent Events | Unsecured revolving credit facility | Proposed Merger Closing Date
SUBSEQUENT EVENTS
Additional borrowing capacity							2,250
Unsecured revolving credit facility							$ 5,000
Subsequent Events | Terminated Treasury Lock Agreements | Cash flow hedges | Designated
SUBSEQUENT EVENTS
Notional amount		$ 5,350
Unamortized loss		56
Unamortized loss, net of tax		43
Subsequent Events | Senior notes
SUBSEQUENT EVENTS
Debt issued		$ 10,500
Mandatory redemption (as percentage)		101.00%
Subsequent Events | 2026 notes
SUBSEQUENT EVENTS
Debt issued		$ 1,000
Interest rate (as a percent)		4.70%
Subsequent Events | 2027 notes
SUBSEQUENT EVENTS
Debt issued		$ 1,000
Interest rate (as a percent)		4.60%
Subsequent Events | 2029 notes
SUBSEQUENT EVENTS
Debt issued		$ 1,400
Interest rate (as a percent)		4.65%
Subsequent Events | 2031 notes
SUBSEQUENT EVENTS
Debt issued		$ 1,300
Interest rate (as a percent)		4.90%
Subsequent Events | 2034 notes
SUBSEQUENT EVENTS
Debt issued		$ 2,200
Interest rate (as a percent)		5.00%
Subsequent Events | 2054 notes
SUBSEQUENT EVENTS
Debt issued		$ 2,100
Interest rate (as a percent)		5.50%
Subsequent Events | 2064 notes
SUBSEQUENT EVENTS
Debt issued		$ 1,500
Interest rate (as a percent)		5.65%

[1] Amount is net of tax of $(37) for the second quarter of 2024 and $33 for the second quarter of 2023. Amount is net of tax of $(16) for the first two quarters of 2024 and $59 for the first two quarters of 2023.