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Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended 1 Months Ended
Mar. 30, 2014
Mar. 31, 2013
Dec. 31, 2013
Mar. 30, 2014
Internal Revenue Service (IRS) [Member]
Mar. 30, 2014
Internal Revenue Service (IRS) [Member]
Minimum [Member]
Mar. 30, 2014
Internal Revenue Service (IRS) [Member]
Maximum [Member]
Mar. 30, 2014
State and local jurisdiction [Member]
Minimum [Member]
Mar. 30, 2014
State and local jurisdiction [Member]
Maximum [Member]
Mar. 30, 2014
Foreign tax authority [Member]
Minimum [Member]
Mar. 30, 2014
Foreign tax authority [Member]
Maximum [Member]
Dec. 31, 2013
Employer's share of FICA taxes [Member]
Internal Revenue Service (IRS) [Member]
Sep. 30, 2013
Employer's share of FICA taxes [Member]
Internal Revenue Service (IRS) [Member]
Mar. 30, 2014
Employer's share of FICA taxes [Member]
Internal Revenue Service (IRS) [Member]
Other long-term liabilities, net [Member]
Mar. 30, 2014
Employer's share of FICA taxes [Member]
Internal Revenue Service (IRS) [Member]
Accrued and other current liabilities [Member]
Apr. 30, 2014
Subsequent event [Member]
Employer's share of FICA taxes [Member]
Internal Revenue Service (IRS) [Member]
Mar. 31, 2014
Subsequent event [Member]
Employer's share of FICA taxes [Member]
Internal Revenue Service (IRS) [Member]
Tax Contingency [Line Items]                                
Effective income tax rate 24.80% 14.10%                            
Blended federal and state statutory income tax rate 39.00% 38.60%                            
Unrecognized tax benefits $ 15.1   $ 17.1                          
Accrued interest and penalties related to uncertain tax positions 0.9   2.1                          
Portion of unrecognized tax benefits, including accrued interest and penalties, that if recognized, would impact the effective tax rate 14.8   17.2                          
Income tax, year under examination       2011                        
Tax year open to examination under the statute of limitations         2007 2013 2001 2012 2007 2013            
Loss contingency accrual                     12.0 5.0        
Payroll tax examination, year under examination         2011 2012                    
FICA tax audit loss contingency, accrual, current                           11.0    
FICA tax audit loss contingency, accrual, noncurrent                         6.0      
Payroll tax adjustment                               5.0
Payments for other taxes                             $ 5.0