Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended								3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Foreign Subsidiaries With Earnings Permanently Reinvested [Member]	Dec. 31, 2012 US Business Credits [Member]	Dec. 31, 2011 US Business Credits [Member]	Dec. 31, 2012 Federal And State [Member]	Dec. 31, 2012 Federal And State [Member]	Dec. 31, 2012 Domestic Tax Authority [Member] Minimum [Member]	Dec. 31, 2012 Domestic Tax Authority [Member] Maximum [Member]	Dec. 31, 2012 Foreign Tax Authority [Member] Minimum [Member]	Dec. 31, 2012 Foreign Tax Authority [Member] Maximum [Member]	Dec. 31, 2012 Classified As Netted Against Deferred Tax Assets [Member]	Dec. 31, 2012 Classified As Non Current Liabilities [Member]
Operating Loss Carryforwards [Line Items]
Uncertain tax benefits resulting from prior period tax positions	$ 97														$ 10	$ 87
Unrecognized tax benefits, would affect effective tax rate	90.9
Accrued interest expense associated with uncertain tax positions	14.0	12.4
Income tax expense included interest associated with uncertain tax positions	2.5	2.7	1.7
Foreign and U.S. state jurisdictions statutes of limitations, years				3 years	5 years
Possible change in unrecognized tax benefit liabilities in the next twelve months	9
Gross deferred tax assets associated with state net operating loss carryforwards	9.0	1.9
Federal benefit of state net operating loss carryforwards	3.2	0.7
Change in valuation allowance for deferred tax assets									66.7	68.8
Deferred tax assets associated with U.S. general business credits							2.4	1.1
Foreign branch net operating losses	12.1	7.1
Undistributed earnings from foreign branches	5.6
Deferred tax liability	$ 4.0	$ 4.1				$ 2.0
Net operating loss allowance expiration											2031	2032	2016	2032