Debt (Details Textuals) (USD $)	9 Months Ended				9 Months Ended		9 Months Ended		9 Months Ended			9 Months Ended						9 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Letter of Credit [Member]	Sep. 30, 2012 Global Revolving Credit Facility [Member]	Sep. 30, 2012 U.S Commercial Paper, Long-Term [Member]	Dec. 31, 2011 U.S Commercial Paper, Long-Term [Member]	Sep. 30, 2012 Canadian Commerial Paper [Member]	Dec. 31, 2011 Canadian Commerial Paper [Member]	Sep. 30, 2012 Global Revolving Credit Facility Member	Sep. 30, 2012 350 million unsecured medium-term notes due March 2017 [Member]	Aug. 01, 2012 350 million unsecured medium-term notes due March 2017 [Member]	Sep. 30, 2012 Unsecured Us Notes Medium Term Notes Long Term [Member]	Sep. 30, 2012 Unsecured Us Obligations Principally Bank Term Loans Long Term [Member]	Sep. 30, 2012 Unsecured Foreign Obligations Long Term [Member]	Sep. 30, 2012 Capital Lease Obligations [Member]	Sep. 30, 2012 Unsecured Medium Term Notes Due 2018 [Member]	Aug. 01, 2012 Unsecured Medium Term Notes Due 2018 [Member]	Sep. 30, 2012 USCommercialPaperShortTerm [Member]	Dec. 31, 2011 USCommercialPaperShortTerm [Member]	Sep. 30, 2012 Short-term Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date Range, Start												2012	2013	2014	2012					2012
Debt Instrument, Maturity Date Range, End					2016		2016		2016			2025	2017	2016	2018			2012		2013
Unamortized original issue discounts	$ 9,200,000	$ 8,700,000
Notional amount of the executed interest rate swap designated as a fair value hedge	550,000,000	550,000,000
Line of Credit Facility [Abstract]
Maximum borrowing capacity under global revolving credit facility			75,000,000	900,000,000
Number of lending institutions	12
Letter of credit outstanding amount			0
Annual facility fees minimum	10.000
Annual facility fees maximum	32.50000
Global revolving credit facility covenant terms, debt to consolidated tangible net worth ratio	less than or equal to 300%
Debt to consolidated tangible net worth ratio	188.00%
Debt (Textuals) [Abstract]
Commercial paper classified as long term debt	306,284,000	415,936,000			283,921,000	415,936,000	22,363,000	0
Commercial Paper																		65,000,000	0
Face amount of unsecured medium-term notes issued											350,000,000						350,000,000
Repurchase price condition of notes										101% of principal plus accrued and unpaid interest						101% of principal plus accrued and unpaid interest
Total available proceeds under trade receivables purchase and sale program	175,000,000
Number of days under trade trade receivables purchase and sale program	364 days
Trade Receivables Purchase And Sale Program Amounts Outstanding	0	0
Letters of Credit and Surety Bonds Outstanding	$ 271,800,000	$ 271,000,000
Global Revolving Credit Facility Unused Capacity Commitment Fee Percent	15.0000