NOTES PAYABLE AND LEASE OBLIGATIONS - Summary of Notes Payable (Parenthetical) (Details) $ in Millions, ¥ in Billions	Jun. 30, 2021 JPY (¥)	May 31, 2021	Apr. 30, 2021 JPY (¥)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 JPY (¥)
3.625% senior notes paid May 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%	3.625%			3.625%
3.625% senior notes due November 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%				3.625%
3.25% senior notes due March 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	3.25%				3.25%
1.125% senior sustainability notes due March 2026
Debt Instrument [Line Items]
Debt instrument, interest rate	1.125%			1.125%	1.125%
Debt instrument, principal amount | $				$ 400
2.875% senior notes due October 2026
Debt Instrument [Line Items]
Debt instrument, interest rate	2.875%				2.875%
3.60% senior notes due April 2030
Debt Instrument [Line Items]
Debt instrument, interest rate	3.60%				3.60%
6.90% senior notes due December 2039
Debt Instrument [Line Items]
Debt instrument, interest rate	6.90%				6.90%
6.45% senior notes due August 2040
Debt Instrument [Line Items]
Debt instrument, interest rate	6.45%				6.45%
4.00% senior notes due October 2046
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%				4.00%
4.750% senior notes due January 2049
Debt Instrument [Line Items]
Debt instrument, interest rate	4.75%				4.75%
.300% senior notes due September 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	0.30%				0.30%
Debt instrument, principal amount	¥ 12.4				¥ 12.4
.932% senior notes due January 2027
Debt Instrument [Line Items]
Debt instrument, interest rate	0.932%				0.932%
Debt instrument, principal amount	¥ 60.0				¥ 60.0
.500% senior notes due December 2029
Debt Instrument [Line Items]
Debt instrument, interest rate	0.50%				0.50%
Debt instrument, principal amount	¥ 12.6				¥ 12.6
.550% senior notes due March 2030
Debt Instrument [Line Items]
Debt instrument, interest rate	0.55%				0.55%
Debt instrument, principal amount	¥ 13.3				¥ 13.3
1.159% senior notes due October 2030
Debt Instrument [Line Items]
Debt instrument, interest rate	1.159%				1.159%
Debt instrument, principal amount	¥ 29.3				¥ 29.3
.633% senior notes due April 2031
Debt Instrument [Line Items]
Debt instrument, interest rate	0.633%		0.633%
Debt instrument, principal amount	¥ 30.0		¥ 30.0
.843% senior notes due December 2031
Debt Instrument [Line Items]
Debt instrument, interest rate	0.843%				0.843%
Debt instrument, principal amount	¥ 9.3				¥ 9.3
.750% senior notes due March 2032
Debt Instrument [Line Items]
Debt instrument, interest rate	0.75%				0.75%
Debt instrument, principal amount	¥ 20.7				¥ 20.7
.844% senior notes due April 2033
Debt Instrument [Line Items]
Debt instrument, interest rate	0.844%		0.844%
Debt instrument, principal amount	¥ 12.0		¥ 12.0
1.488% senior notes due October 2033
Debt Instrument [Line Items]
Debt instrument, interest rate	1.488%				1.488%
Debt instrument, principal amount	¥ 15.2				¥ 15.2
.934% senior notes due December 2034
Debt Instrument [Line Items]
Debt instrument, interest rate	0.934%				0.934%
Debt instrument, principal amount	¥ 9.8				¥ 9.8
.830% senior notes due March 2035
Debt Instrument [Line Items]
Debt instrument, interest rate	0.83%				0.83%
Debt instrument, principal amount	¥ 10.6				¥ 10.6
1.039% senior notes due April 2036
Debt Instrument [Line Items]
Debt instrument, interest rate	1.039%		1.039%
Debt instrument, principal amount	¥ 10.0		¥ 10.0
1.750% senior notes due October 2038
Debt Instrument [Line Items]
Debt instrument, interest rate	1.75%				1.75%
Debt instrument, principal amount	¥ 8.9				¥ 8.9
1.122% senior notes due December 2039
Debt Instrument [Line Items]
Debt instrument, interest rate	1.122%				1.122%
Debt instrument, principal amount	¥ 6.3				¥ 6.3
1.264% senior notes due April 2041
Debt Instrument [Line Items]
Debt instrument, interest rate	1.264%		1.264%
Debt instrument, principal amount	¥ 10.0		¥ 10.0
2.108% subordinated notes due October 2047
Debt Instrument [Line Items]
Debt instrument, interest rate	2.108%				2.108%
Debt instrument, principal amount	¥ 60.0				¥ 60.0
.963% subordinated bonds due April 2049
Debt Instrument [Line Items]
Debt instrument, interest rate	0.963%				0.963%
Debt instrument, principal amount	¥ 30.0				¥ 30.0
1.560% senior notes due April 2051
Debt Instrument [Line Items]
Debt instrument, interest rate	1.56%		1.56%
Debt instrument, principal amount	¥ 20.0		¥ 20.0
Yen-denominated loan variable interest rate due September 2026
Debt Instrument [Line Items]
Debt instrument, interest rate	0.42%				0.43%
Debt instrument, principal amount	¥ 5.0				¥ 5.0
Yen-denominated loan variable interest rate due September 2029
Debt Instrument [Line Items]
Debt instrument, interest rate	0.57%				0.58%
Debt instrument, principal amount	¥ 25.0				¥ 25.0