Derivative Financial Instruments (Narrative) (Details) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended				12 Months Ended
	Dec. 31, 2014 Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member] USD ($)	Dec. 31, 2013 Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member] USD ($)	Nov. 30, 2012 Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member] USD ($)	Dec. 31, 2013 Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member] USD ($)	Dec. 31, 2014 Senior Unsecured Notes Due 2022 [Member]	Dec. 31, 2013 Senior Unsecured Notes Due 2022 [Member]	Nov. 30, 2012 Senior Unsecured Notes Due 2022 [Member] USD ($)	Dec. 31, 2012 Term C Loan Facility [Member] USD ($)	Dec. 31, 2014 Senior Unsecured Notes Due 2019 [Member]	Sep. 24, 2014 Senior Unsecured Notes Due 2019 [Member] EUR (€)	Dec. 31, 2013 Senior Unsecured Notes Due 2019 [Member]	Dec. 31, 2012 Senior Unsecured Notes Due 2019 [Member]
Derivative [Line Items]
Senior notes							$ 500			€ 300
Interest Rate					4.625%	4.625%	4.625%		3.25%	3.25%	3.25%	3.25%
Repayments of Lines of Credit								400
Notional Value	$ 500	$ 500	$ 395	$ 1,100
Expiration Date	Jan. 02, 2016	Jan. 02, 2016	Jan. 02, 2014	Jan. 02, 2014