Derivative Financial Instruments (Schedule of Interest Rate Swap Derivatives) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member]
Derivative [Line Items]
Effective date	Jan. 02, 2012		Jan. 02, 2012
Expiration date	Jan. 02, 2014		Jan. 02, 2014
Fixed rate	1.71%	[1]	1.71%	[1]
Derivative, Notional Amount	$ 1,100		$ 1,100
Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member]
Derivative [Line Items]
Effective date	Jan. 02, 2014		Jan. 02, 2014
Expiration date	Jan. 02, 2016		Jan. 02, 2016
Fixed rate	1.02%	[1]	1.02%	[1]
Derivative, Notional Amount	$ 500		$ 500

[1] Fixes the LIBOR portion of the Company's US-dollar denominated variable rate borrowings (Note 9).