Financing Arrangements (Details) (USD $)	12 Months Ended							12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Uncommitted and Committed Foreign and Domestic Working Capital Facilities [Member]	Dec. 31, 2010 Uncommitted and Committed Foreign and Domestic Working Capital Facilities [Member]	Dec. 31, 2011 Global Syndicated Revolving Credit Facility [Member]	Dec. 31, 2010 Global Syndicated Revolving Credit Facility [Member]	Dec. 31, 2011 Working Capital Facilities [Member]	Dec. 31, 2011 New Facility [Member]	Dec. 31, 2011 Terminated Facility [Member]	Dec. 31, 2011 Medium-term notes [Member]	Dec. 31, 2010 Medium-term notes [Member]	Dec. 31, 2011 7.625% senior notes, maturing in 2012 [Member]	Oct. 31, 2010 7.625% senior notes, maturing in 2012 [Member]	Dec. 31, 2011 6.29% senior notes, maturing in 2016 [Member]	Dec. 31, 2010 6.29% senior notes, maturing in 2016 [Member]	Dec. 31, 2011 6.125% senior notes, maturing in 2019 [Member]	Dec. 31, 2010 6.125% senior notes, maturing in 2019 [Member]	Dec. 31, 2011 4.875% senior notes, maturing in 2020 [Member]	Dec. 31, 2010 4.875% senior notes, maturing in 2020 [Member]	Dec. 31, 2011 3.6% senior notes, maturing in 2021 [Member]	Dec. 31, 2010 3.6% senior notes, maturing in 2021 [Member]	Dec. 31, 2011 6.80% senior notes, maturing in 2036 [Member]	Dec. 31, 2010 6.80% senior notes, maturing in 2036 [Member]	Dec. 31, 2011 7.0% senior notes, maturing in 2038 [Member]	Dec. 31, 2010 7.0% senior notes, maturing in 2038 [Member]	Dec. 31, 2011 Notes Payable Other Payables [Member]	Dec. 31, 2010 Notes Payable Other Payables [Member]
Long-term Debt
Long-term Debt	$ 2,352,300,000	$ 2,339,600,000								$ 398,900,000	$ 398,900,000			$ 294,200,000	$ 295,000,000	$ 298,300,000	$ 298,100,000	$ 299,400,000	$ 299,400,000	$ 598,900,000	$ 598,800,000	$ 234,500,000	$ 233,700,000	$ 199,200,000	$ 199,200,000	$ 28,900,000	$ 16,500,000
Capital lease obligations	22,100,000	13,200,000
Total	2,374,400,000	2,352,800,000
Schedule of Long-term Debt Instruments
Maturity date of senior notes												2012		2016		2019		2020		2021		2036		2038		2020
Debt instrument, interest rate, stated percentage												7.625%		6.29%		6.125%		4.875%		3.60%		6.80%		7.00%
Debt instrument, interest rate, stated percentage rate, range, minimum										6.80%																0.30%
Debt instrument, interest rate, stated percentage rate, range, maximum										8.70%																4.50%
Principal amount of senior notes due													257,460,000
Line of Credit Facility [Line Items]
Borrowings outstanding under uncommitted and committed foreign and domestic working capital facilities			25,000,000	4,100,000
Letters of credit outstanding			37,900,000		37,000,000	62,500,000	117,600,000
Global syndicated revolving credit facility								700,000,000	500,000,000
Maturity period of global syndicated revolving credit facility								May 2016	May 2012
Financing Arrangements (Textual) [Abstract]
Revolving credit facility term	Five
Borrowings under credit facility	12,300,000	0
Borrowing capacity under global syndicated revolving credit facility	650,700,000
Uncommitted domestic working capital facilities	75,000,000
Uncommitted and committed foreign working capital facilities	154,800,000
Amount of debt due within five years	306,500,000
Loss on extinguishment of debt		34,900,000
Debt redemption premium		(37,400,000)
Recognized gain for terminated interest rate swaps		$ 2,500,000