Long Term Debt Parentheticals	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Debt instrument, maturity date	Jul. 29, 2016
Senior credit facilities
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.15%	3.53%
Debt instrument, maturity date	Jul. 29, 2016	Oct. 01, 2013
Series A senior notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.85%	4.85%
Debt instrument, maturity date	Nov. 01, 2011	Nov. 01, 2011
Series B senior notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.36%	5.36%
Debt instrument, maturity date	Jul. 26, 2015	Jul. 26, 2015
Series C senior notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	1.12%	0.99%
Debt instrument, maturity date	Jul. 26, 2012	Jul. 26, 2012
Other debt and capital leases
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.50%	2.50%
Debt instrument, maturity date	Jan. 14, 2054	Jan. 01, 2024