Debt and Other Financing (Debt) (Details) (USD $) In Millions, unless otherwise specified																													12 Months Ended
	Jan. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Apr. 30, 2003	Dec. 31, 2012 Four Point Eight Percent Notes, Due March Two Thousand Thirteen [Member]	Dec. 31, 2011 Four Point Eight Percent Notes, Due March Two Thousand Thirteen [Member]	Mar. 31, 2008 Four Point Eight Percent Notes, Due March Two Thousand Thirteen [Member]	Dec. 31, 2012 Four Point Six Two Five Percent Notes, Due May Two Thousand Thirteen [Member]	Dec. 31, 2011 Four Point Six Two Five Percent Notes, Due May Two Thousand Thirteen [Member]	May 31, 2003 Four Point Six Two Five Percent Notes, Due May Two Thousand Thirteen [Member]	Dec. 31, 2012 Five Point Six Two Five Percent Notes, Due March Two Thousand Fourteen [Member]	Dec. 31, 2011 Five Point Six Two Five Percent Notes, Due March Two Thousand Fourteen [Member]	Mar. 31, 2009 Five Point Six Two Five Percent Notes, Due March Two Thousand Fourteen [Member]	Dec. 31, 2012 Term Loan, 25% due June 2014 and remaining due June 2015 [Member]	Dec. 31, 2011 Term Loan, 25% due June 2014 and remaining due June 2015 [Member]	Dec. 31, 2012 Two Point Six Percent Notes, Due November Two Thousand Fifteen [Member]	Dec. 31, 2011 Two Point Six Percent Notes, Due November Two Thousand Fifteen [Member]	Nov. 23, 2010 Two Point Six Percent Notes, Due November Two Thousand Fifteen [Member]	Dec. 31, 2012 Five Point Seven Five Percent Notes, Due March Two Thousand Eighteen [Member]	Dec. 31, 2011 Five Point Seven Five Percent Notes, Due March Two Thousand Eighteen [Member]	Mar. 31, 2008 Five Point Seven Five Percent Notes, Due March Two Thousand Eighteen [Member]	Dec. 31, 2012 Four Point Two Percent Notes, Due July Two Thousand Eighteen [Member]	Dec. 31, 2011 Four Point Two Percent Notes, Due July Two Thousand Eighteen [Member]	Jun. 30, 2003 Four Point Two Percent Notes, Due July Two Thousand Eighteen [Member]	Dec. 31, 2012 Six Point Five Percent Notes, Due March Two Thousand Nineteen [Member]	Dec. 31, 2011 Six Point Five Percent Notes, Due March Two Thousand Nineteen [Member]	Mar. 31, 2009 Six Point Five Percent Notes, Due March Two Thousand Nineteen [Member]	Dec. 31, 2012 Other, payable through 2019 with interest from 2.40% to 6.50% [Member]	Dec. 31, 2011 Other, payable through 2019 with interest from 2.40% to 6.50% [Member]	Dec. 31, 2012 Four Point Zero Three Percent Notes, Due November Two Thousand Twenty [Member]	Dec. 31, 2011 Four Point Zero Three Percent Notes, Due November Two Thousand Twenty [Member]	Nov. 23, 2010 Four Point Zero Three Percent Notes, Due November Two Thousand Twenty [Member]	Dec. 31, 2012 Four Point One Eight Percent Notes, Due November Two Thousand Twenty Two [Member]	Dec. 31, 2011 Four Point One Eight Percent Notes, Due November Two Thousand Twenty Two [Member]	Nov. 23, 2010 Four Point One Eight Percent Notes, Due November Two Thousand Twenty Two [Member]
Notes payable		$ 180.6		$ 832.4
Current portion of long-term debt		391.4		16.9
Total		572.0		849.3
Notes						250.0	249.9		124.0	121.3		499.4	498.8							249.6	249.5		249.6	249.5		347.3	346.9
Long-term Line of Credit, Noncurrent															550.0	0
Senior Notes																	142.0	142.0													290.0	290.0		103.0	103.0
Other																													75.6	77.5
Total		2,880.5		2,328.4
Adjustment for debt with fair value hedges		93.1		147.6
Amortization of swap termination	90.4	41.7	46.1	0
Less current portion		(391.4)		(16.9)
Total long-term debt		$ 2,623.9		$ 2,459.1
Interest rate, stated percentage					6.25%			4.80%			4.625%			5.625%					2.60%			5.75%			4.20%			6.50%					4.03%			4.18%
Interest rate, stated percentage, minimum																													2.40%
Interest rate, stated percentage, maximum																													6.50%