Goodwill And Intangible Assets (Changes To Goodwill) (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Balance at beginning of period	$ 1,437.7
Currency translation	(11.6)
Balance at end of period	1,426.0
Intangible Assets, Net (Excluding Goodwill)	491.3	$ 519.1	$ 503.7
Intangibles with indefinite useful lives	71.2	$ 70.9
Aerospace & Electronics
Goodwill [Line Items]
Balance at beginning of period	202.5
Adjustments to purchase price allocations	0.0
Currency translation	0.0
Balance at end of period	202.5
Process Flow Technologies
Goodwill [Line Items]
Balance at beginning of period	360.0
Adjustments to purchase price allocations	(0.1)
Currency translation	(3.9)
Balance at end of period	356.0
Payment & Merchandising Technologies
Goodwill [Line Items]
Balance at beginning of period	875.2
Adjustments to purchase price allocations	0.0
Currency translation	(7.7)
Balance at end of period	$ 867.5