Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:			$ (766,200)			$ (637,600)	$ (766,200)	$ (637,600)
Other comprehensive income (loss)	$ (79,000)	$ (44,500)	67,400	$ (170,300)	$ (191,400)	(1,400)	(56,100)	(363,100)
Stockholders' Equity Note, Spinoff Transaction				800	(300)	(6,700)
Balance at June 30:	(822,000)			(997,500)			(822,000)	(997,500)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(86,100)			(189,500)			(62,200)	(383,800)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:			(547,600)			(346,800)	(547,600)	(346,800)
Other comprehensive income (loss)							(61,900)	(380,600)
Balance at June 30:	(609,500)			(727,400)			(609,500)	(727,400)
Accumulated  other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	(78,600)	(44,100)	66,900	(168,400)	(190,100)	(1,400)	(55,800)	(359,900)
Stockholders' Equity Note, Spinoff Transaction				0	0	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:			(4,500)			7,100	(4,500)	7,100
Other comprehensive income (loss)							500	(26,300)
Balance at June 30:	(4,000)			(19,200)			(4,000)	(19,200)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:			(214,100)			(297,900)	(214,100)	(297,900)
Other comprehensive income (loss)							5,600	47,000
Balance at June 30:	(208,500)			(250,900)			(208,500)	(250,900)
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ (400)	$ (400)	$ 500	(1,900)	(1,300)	0
Stockholders' Equity Note, Spinoff Transaction				$ 0	$ 0	$ 0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax							$ (300)	$ (3,200)