FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) $ in Millions, ₨ in Billions	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 05, 2024 USD ($)	Jun. 05, 2024 INR (₨)	Mar. 23, 2024 USD ($)	Mar. 23, 2024 INR (₨)	Dec. 31, 2023 USD ($)
Assets:
Unrealized gains (losses) on equity securities	$ 40.7	$ (1.8)	$ 26.0	$ (0.6)
VIL
Assets:
Investments in equity securities	0.0		0.0
VIL \| OCDs
Assets:
Debt securities	0.0		0.0		$ 19.2	₨ 1.6	$ 172.7	₨ 14.4
Fair Value, Measurements, Recurring \| Level 1
Assets:
Investments in equity securities	54.2		54.2						$ 28.2
Fair Value, Measurements, Recurring \| Level 1 \| VIL \| OCDs
Assets:
Debt securities	0.0		0.0						0.0
Fair Value, Measurements, Recurring \| Level 2
Assets:
Investments in equity securities	5.3		5.3						5.3
Fair Value, Measurements, Recurring \| Level 2 \| VIL \| OCDs
Assets:
Debt securities	0.0		0.0						192.3
Fair Value, Measurements, Recurring \| Level 3
Assets:
Investments in equity securities	0.0		0.0						0.0
Fair Value, Measurements, Recurring \| Level 3 \| VIL \| OCDs
Assets:
Debt securities	$ 0.0		$ 0.0						$ 0.0