Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended							1 Months Ended
	Dec. 31, 2012	Nov. 30, 2012	Dec. 31, 2013 Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member]	Dec. 31, 2012 Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member]	Dec. 31, 2013 Senior Unsecured Notes Due 2022 [Member]	Dec. 31, 2012 Senior Unsecured Notes Due 2022 [Member]	Nov. 30, 2012 Senior Unsecured Notes Due 2022 [Member]	Nov. 30, 2012 Term C Loan Facility [Member]
Derivative [Line Items]
Interest rate, stated percentage					4.625%	4.625%	4.625%
Line of credit facility, prepayment								$ 400
Notional value		395	1,100	1,100
Derivative interest expense	$ 6