Financing (Components Of Debt) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
U.S. dollar-denominated commercial paper	$ 977,300,000	$ 180,000,000
Other	251,000,000	152,400,000
Total debt	5,305,200,000	2,824,700,000
Less - currently payable	98,392,000	40,761,000
Long-term debt	5,206,800,000	2,783,907,000
Eurobond Notes [Member]
Debt Instrument [Line Items]
Guaranteed Eurobond Notes 4.5% due 2013	647,300,000	668,900,000
Interest rate of debt instrument	4.50%
2013 Notes [Member]
Debt Instrument [Line Items]
Senior notes	300,000,000
Debt instrument, maturity year	2013
2014 Notes [Member]
Debt Instrument [Line Items]
Senior notes	400,000,000
Interest rate of debt instrument	1.30%
Debt instrument, maturity year	2014
2016 Notes [Member]
Debt Instrument [Line Items]
Senior notes	500,000,000
Interest rate of debt instrument	2.30%
Debt instrument, maturity year	2016
2018 Notes [Member]
Debt Instrument [Line Items]
Senior notes	500,000,000	500,000,000
Interest rate of debt instrument	5.625%
Debt instrument, maturity year	2018
2019 Notes [Member]
Debt Instrument [Line Items]
Senior notes	750,000,000	750,000,000
Interest rate of debt instrument	5.40%
Debt instrument, maturity year	2019
2021 Notes [Member]
Debt Instrument [Line Items]
Senior notes	600,000,000
Interest rate of debt instrument	3.90%
Debt instrument, maturity year	2021
Zero-Coupon LYONs [Member]
Debt Instrument [Line Items]
Zero-coupon Liquid Yield Option Notes due 2021 (LYONs)	$ 379,600,000	$ 573,400,000