Fair Value of Debt (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
U.S. Private Placement - Long-Term Debt
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value	$ 303.2	[1]	$ 305.8	[1]
Fair value	325.9		329.5
Medium-term Notes
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value	101.1	[1]	99.8	[1]
Fair value	100.6		99.4
Notes Long Term Debt
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value			107.6	[1]
Fair value			108.9
Other Long-Term Debt
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value	19.2	[1]	49.7	[1]
Fair value	19.2		49.7
Total Long-term Debt
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value	423.5	[1]	562.9	[1]
Fair value	445.7		587.5
Overdrafts And Other Short-Term Debt
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value	82.6	[1]	60.3	[1]
Fair value	82.6		60.3
Short-Term Portion Of Long-Term Debt
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value	133.8	[1]	9.5	[1]
Fair value	135.5		9.5
Total Short-term Debt
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Carrying value	216.4	[1]	69.8	[1]
Fair value	$ 218.1		$ 69.8

[1] Debt as reported in balance sheet.