Equity Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	$ (1,006.6)	$ (964.1)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(67.5)	(3.5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	11.8	13.0
Provision for income taxes	(3.0)	(4.0)
Other comprehensive income (loss)	(58.6)	5.9
Balance at June 30:	(926.0)	(958.6)
Distribution of Industrial Businesses	(1,334.3)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	(554.8)	(516.8)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(48.1)	(2.4)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.0	0.0
Provision for income taxes	0.0	0.0
Other comprehensive income (loss)	22.1	(2.4)
Balance at June 30:	(532.7)	(519.2)
Distribution of Industrial Businesses	70.2
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	(58.7)	5.5
Distribution of Industrial Businesses	139.3
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	5.6	6.7
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0.3	(1.4)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.3	0.1
Provision for income taxes	(0.2)	(0.5)
Other comprehensive income (loss)	0.4	(1.8)
Balance at June 30:	6.0	4.9
Distribution of Industrial Businesses	0.0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31:	(457.4)	(454.0)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(19.7)	0.3
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	11.5	12.9
Provision for income taxes	(2.8)	(3.5)
Other comprehensive income (loss)	58.1	9.7
Balance at June 30:	(399.3)	$ (444.3)
Distribution of Industrial Businesses	69.1
IndustrialSegmentBusinesses [Domain] | Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ 80.6