Subsequent Event (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Apr. 21, 2015
Subsequent Event [Line Items]
Potential Increase to Term Loan and Line of Credit	$ 500.0
Amended Credit Agreement [Member]
Subsequent Event [Line Items]
Potential Increase to Term Loan and Line of Credit		750.0
Multi Currency Sub Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	100.0
Multi Currency Sub Facility [Member] | Amended Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		100.0
Letter Of Credit Sub Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	50.0
Letter Of Credit Sub Facility [Member] | Amended Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		50.0
Amended Credit Agreement [Member] | Amended Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		850.0
Contingent Credit Agreement Revolving Facility [Domain]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	550.0
Contingent Credit Agreement Revolving Facility [Domain] | Amended Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 550.0