Changes In Equity And Comprehensive Income (Classification Of Accumulated Other Comprehensive Income Reflected On Consolidated Balance Sheets) (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance		$ (376.7)
Other comprehensive income (loss) before reclassifications		17.0
Amounts reclassified from accumulated other comprehensive income		3.6
Net current-period othre comprehensive income (loss)		20.6
Accumulated other comprehensive loss, ending balance	$ (356.1)	(356.1)	$ (376.7)
Changes in pension and post-retirement plan assets and benefit obligation, Tax benefit	108.4		109.8
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance		(266.2)
Other comprehensive income (loss) before reclassifications		0.2
Net current-period othre comprehensive income (loss)		3.8
Accumulated other comprehensive loss, ending balance	(262.4)	(262.4)	(266.2)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance		(110.6)
Other comprehensive income (loss) before reclassifications		16.8
Amounts reclassified from accumulated other comprehensive income		0.0
Net current-period othre comprehensive income (loss)		16.8
Accumulated other comprehensive loss, ending balance	$ (93.8)	$ (93.8)	$ (110.6)