Indebtedness (Schedule Of Long-Term Debt Maturities) (Details) (USD $)				3 Months Ended	34 Months Ended
	Dec. 31, 2012		Dec. 31, 2012 Senior Notes, Net [Member]	Dec. 31, 2012 Trade receivables securitization [Member]	Dec. 31, 2012 2.85% Senior Notes Maturing October 2013 [Member] Senior Notes, Net [Member]
Maturities of Long-term Debt [Abstract]
December 31, 2013	$ 301,653,000	[1]
March 31, 2014	229,000	[1]
March 31, 2015	400,549,000	[1]
March 31, 2016	545,263,000	[1]
March 31, 2017	296,321,000	[1]
Thereafter	465,454,000	[1]
Total maturities of long-term debt	2,009,469,000	[1]
Trade Receivables, Expiration Date				December 2015
Unamortized Discounts			900,000
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge					$ 3,700,000

[1] Outstanding borrowings under the Securitization Agreement at December 31, 2012 are reflected as maturing at the agreement’s expiration in December 2015.The Senior Notes are reflected in the debt maturity schedule at their maturity values rather than their carrying values, which are net of aggregate discounts of $0.9 million at December 31, 2012. The 2013 Notes also include additional carrying value of $3.7 million at December 31, 2012 related to the Company’s fair value hedges — see Note 7 for additional disclosure.