NOTES PAYABLE AND LEASE OBLIGATIONS - Additional Information (Details) $ in Millions, ¥ in Billions	1 Months Ended		3 Months Ended		9 Months Ended
	Aug. 31, 2025 USD ($) series	May 31, 2025 JPY (¥) series	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 JPY (¥)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 JPY (¥) series	Dec. 31, 2024 JPY (¥)
Debt Instrument [Line Items]
Number of series of senior notes issued through a U.S. public offering | series									4
Number of series of senior notes issued through a private placement | series		4
Interest expense on debt | $			$ 56	$ 49	$ 157	$ 145
Number of senior note facility agreements | series	2
10-Year Senior Note Facility Agreement
Debt Instrument [Line Items]
Debt instrument, term	10 years
Senior note facility, commitment fee percentage	0.9875%
30-Year Senior Note Facility Agreement
Debt Instrument [Line Items]
Debt instrument, term	30 years
Senior note facility, commitment fee percentage	1.1218%
.300% senior notes paid September 2025
Debt Instrument [Line Items]
Debt instrument, principal amount redeemed							¥ 12.4
Debt instrument, principal amount										¥ 12.4
Debt instrument, interest rate							0.30%	0.30%		0.30%
Senior Notes
Debt Instrument [Line Items]
Debt instrument, principal amount									¥ 74.9
1.726% senior notes due October 2030
Debt Instrument [Line Items]
Debt instrument, principal amount							¥ 35.0		¥ 35.0
Debt instrument, interest rate							1.726%	1.726%	1.726%
2.003% senior notes due December 2032
Debt Instrument [Line Items]
Debt instrument, principal amount							¥ 23.4		¥ 23.4
Debt instrument, interest rate							2.003%	2.003%	2.003%
2.369% senior notes due June 2035
Debt Instrument [Line Items]
Debt instrument, principal amount							¥ 9.5		¥ 9.5
Debt instrument, interest rate							2.369%	2.369%	2.369%
2.779% senior notes due June 2040
Debt Instrument [Line Items]
Debt instrument, principal amount							¥ 7.0		¥ 7.0
Debt instrument, interest rate							2.779%	2.779%	2.779%
Private Placement
Debt Instrument [Line Items]
Debt instrument, principal amount		¥ 75.1
1.990% senior notes due May 2032
Debt Instrument [Line Items]
Debt instrument, principal amount		¥ 18.2					¥ 18.2
Debt instrument, interest rate		1.99%					1.99%	1.99%
Debt Instrument, Redemption, Description		These notes are redeemable at the Parent Company's option (i) in whole at any time or (ii) in part from time to time in an amount not less than 5% of the aggregate principal amount then outstanding of the notes to be redeemed.
2.320% senior notes due May 2035
Debt Instrument [Line Items]
Debt instrument, principal amount		¥ 38.3					¥ 38.3
Debt instrument, interest rate		2.32%					2.32%	2.32%
Debt Instrument, Redemption, Description		These notes are redeemable at the Parent Company's option (i) in whole at any time or (ii) in part from time to time in an amount not less than 5% of the aggregate principal amount then outstanding of the notes to be redeemed.
2.650% senior notes due May 2040
Debt Instrument [Line Items]
Debt instrument, principal amount		¥ 11.6					¥ 11.6
Debt instrument, interest rate		2.65%					2.65%	2.65%
Debt Instrument, Redemption, Description		These notes are redeemable at the Parent Company's option (i) in whole at any time or (ii) in part from time to time in an amount not less than 5% of the aggregate principal amount then outstanding of the notes to be redeemed.
3.040% senior notes due May 2045
Debt Instrument [Line Items]
Debt instrument, principal amount		¥ 7.0					¥ 7.0
Debt instrument, interest rate		3.04%					3.04%	3.04%
Debt Instrument, Redemption, Description		These notes are redeemable at the Parent Company's option (i) in whole at any time or (ii) in part from time to time in an amount not less than 5% of the aggregate principal amount then outstanding of the notes to be redeemed.
5.251% senior notes due August 2035
Debt Instrument [Line Items]
Debt instrument, interest rate	5.251%
Debt instrument, unused borrowing capacity | $	$ 1,000
5.991% senior notes due August 2055
Debt Instrument [Line Items]
Debt instrument, interest rate	5.991%
Debt instrument, unused borrowing capacity | $	$ 1,000
Lines of credit
Debt Instrument [Line Items]
Debt instrument, debt default, amount | $								$ 0
Notes payable
Debt Instrument [Line Items]
Debt instrument, debt default, amount | $								$ 0