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Income Taxes Components of Noncurrent Deferred Tax Assets and Liabilities (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Noncurrent deferred tax assets $ 341.8 $ 366.1
U.S. tax on unremitted foreign earnings (85.0) (85.2)
Fixed assets and other (9.8) (9.5)
Noncurrent deferred tax asset, net 332.0 356.6
Deferred Tax Assets, Noncurrent [Member]
    
Employee benefits 161.5 200.7
NOL carryforwards 176.9 177.4
Tax credit carryforward 82.9 79.0
Capital allowance carryforward 16.0 17.9
Fixed assets 10.3 9.0
Deferred revenue 15.7 20.0
Capitalized expenditures 113.6 99.3
Other 2.9 4.0
Valuation allowances (153.0) (156.0)
Noncurrent deferred tax assets 426.8 451.3
Deferred Tax Assets, Current [Member]
    
Employee benefits 14.5 16.9
Other $ 24.6 $ 15.5