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DEBT - Notes (Details)	1 Months Ended						3 Months Ended		6 Months Ended
DEBT - Notes (Details)	Mar. 31, 2025 USD ($)	May 31, 2024 USD ($)	Jun. 30, 2023 JPY (¥)	May 31, 2022 USD ($)	May 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Outstanding aggregate principal amount							$ 10,915,000,000		$ 10,915,000,000
Senior Notes
Debt Instrument [Line Items]
Outstanding aggregate principal amount							10,915,000,000		10,915,000,000		$ 10,574,000,000
Interest expense and fees							110,000,000	$ 90,000,000	208,000,000	$ 174,000,000
Fixed And Floating Rate Notes \| Senior Notes
Debt Instrument [Line Items]
Face amount	$ 1,500,000,000
Floating-rate notes \| Senior Notes
Debt Instrument [Line Items]
Face amount	$ 450,000,000
Basis spread on variable rate (in percent)	0.67%
Outstanding aggregate principal amount							$ 450,000,000		$ 450,000,000		0
Fixed-rate 4.450% notes \| Senior Notes
Debt Instrument [Line Items]
Face amount	$ 450,000,000
Interest rate	4.45%						4.45%		4.45%
Outstanding aggregate principal amount							$ 450,000,000		$ 450,000,000		0
Fixed-rate 5.100% notes \| Senior Notes
Debt Instrument [Line Items]
Face amount	$ 600,000,000
Interest rate	5.10%						5.10%		5.10%
Outstanding aggregate principal amount							$ 600,000,000		$ 600,000,000		$ 0
Fixed-Rate Notes Issued May 2024 \| Senior Notes
Debt Instrument [Line Items]
Face amount		$ 1,300,000,000
Redemption price (in percent)		101.00%
Fixed-Rate Notes Issued June 2023 \| Senior Notes
Debt Instrument [Line Items]
Face amount			¥ 90,000,000,000				$ 622,000,000		$ 622,000,000
Redemption price (in percent)			101.00%
Fixed-Rate Notes Issued May 2022 \| Senior Notes
Debt Instrument [Line Items]
Face amount				$ 3,000,000,000
Redemption price (in percent)				101.00%
Fixed-rate Notes Issued May 2020 \| Senior Notes
Debt Instrument [Line Items]
Face amount					$ 4,000,000,000
Redemption price (in percent)					101.00%
Fixed-rate Notes Issued September 2019 \| Senior Notes
Debt Instrument [Line Items]
Face amount						$ 5,000,000,000
Redemption price (in percent)						101.00%
Fixed-Rate Notes Issued March 2025 \| Senior Notes
Debt Instrument [Line Items]
Redemption price (in percent)	101.00%