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ACCUMULATED OTHER COMPREHENSIVE LOSS, NET (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Rollforward
Beginning balance	$ 3,985.0	$ 3,465.3
Other comprehensive (loss) income	(13.8)	18.8
Ending balance	4,024.1	3,538.7
Accumulated Other Comprehensive (Loss) Income, Net
AOCI Rollforward
Beginning balance	(9.4)	(31.0)
Other comprehensive (loss) income	(13.8)	18.8
Ending balance	(23.2)	$ (12.2)
Foreign Currency Translation Adjustment
AOCI Rollforward
Beginning balance	(5.6)
Other comprehensive (loss) income	(13.5)
Ending balance	(19.1)
Unrealized Investment Loss
AOCI Rollforward
Beginning balance	(3.7)
Other comprehensive (loss) income	(0.5)
Ending balance	(4.2)
Post-Retirement Benefits
AOCI Rollforward
Beginning balance	(0.1)
Other comprehensive (loss) income	0.2
Ending balance	$ 0.1

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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