A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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- Definition

The increase (decrease) in stockholders' equity during the period.

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Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:		$ (864.1)		$ (670.8)	$ (864.1)	$ (670.8)	$ (670.8)
Other comprehensive income (loss)	$ 240.4	123.7	$ (32.2)	(76.8)	364.1	(109.0)
Balance at June 30:	(501.3)		(778.4)		(501.3)	(778.4)	(864.1)	$ (670.8)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	240.4		(35.1)		350.9	(111.7)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)					349.6	(110.3)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity, Period Increase (Decrease)					(326.3)	(585.2)	(675.9)	(474.9)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	239.5	123.3	(32.1)	(75.5)	362.8	(107.6)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)					19.3	0.1
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity, Period Increase (Decrease)					17.9	3.1	(1.4)	3.0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)					(6.1)	2.6
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity, Period Increase (Decrease)					(192.9)	(196.3)	$ (186.8)	$ (198.9)
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ 0.9	$ 0.4	$ (0.1)	$ (1.3)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					$ 1.3	$ (1.4)