Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	$ (3,333.4)
Accumulated other comprehensive income (loss), Other comprehensive income before reclassifications	21.7
Accumulated other comprehensive income (loss), Amounts reclassified from accumulated other comprehensive income	71.9
Accumulated other comprehensive income (loss), Current period other comprehensive income	93.6
Accumulated other comprehensive income (loss), ending balance	(3,239.8)
Translation Adjustments, beginning balance	(676.8)
Translation Adjustments, Other comprehensive income before reclassifications	38.9
Translation Adjustments, Amounts reclassified from accumulated other comprehensive income	0
Translation Adjustments, Current period other comprehensive income	38.9
Translation Adjustments, ending balance	(637.9)
Postretirement Plans, beginning balance	(2,656.6)
Postretirement Plans, Other comprehensive income before reclassifications	(17.2)
Postretirement Plans, Amounts reclassified from accumulated other comprehensive income	71.9
Postretirement Plans, Current period other comprehensive income	54.7
Postretirement Plans, ending balance	$ (2,601.9)