Accumulated Other Comprehensive Income - Changes in Components of Accumulated Other Comprehensive Income, Net of Tax (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Other Comprehensive Income Loss [Line Items]
Stockholders Equity, Beginning Balance	$ 12,388.1
AOCI before reclassifications	0.6
Reclassifications to statements of earnings	(13.8)
Stockholders Equity, Ending Balance	11,878.6
Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Stockholders Equity, Beginning Balance	16.4
AOCI before reclassifications	54.8
Reclassifications to statements of earnings	(13.5)
Stockholders Equity, Ending Balance	57.7
Foreign Currency Translation [Member]
Other Comprehensive Income Loss [Line Items]
Stockholders Equity, Beginning Balance	(32.8)
AOCI before reclassifications	(54.2)
Stockholders Equity, Ending Balance	(87.0)
Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Stockholders Equity, Beginning Balance	(225.5)
Reclassifications to statements of earnings	(0.3)
Stockholders Equity, Ending Balance	(225.8)
Total AOCI [Member]
Other Comprehensive Income Loss [Line Items]
Stockholders Equity, Beginning Balance	(241.9)
Stockholders Equity, Ending Balance	$ (255.1)