XML 49 R37.htm IDEA: XBRL DOCUMENT v3.10.0.1
New Accounting Standards ASC 606 Adoption (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Jan. 01, 2016
Trade receivables, net of allowances $ 1,610.0   $ 1,610.0   $ 1,739.4  
Notes and other receivables 297.6   297.6   385.3  
Accounts Receivable, Reimbursed by Client, Current 1,400.8   1,400.8   1,263.3  
Contract with Customer, Asset, Net, Current 293.0   293.0   178.4  
Prepaid Expense and Other Assets, Current 315.2   315.2   389.1  
Long-term receivables 179.6   179.6   164.7  
Other Assets, Noncurrent 164.4   164.4   155.5  
Accounts Payable and Accrued Liabilities, Current 995.1   995.1   993.1  
Accounts Payable, Reimbursed by Client, Current 1,012.2   1,012.2   1,022.6  
Accrued compensation & benefits 1,205.7   1,205.7   1,419.1  
Short-term contract liabilities and deferred income 170.9   170.9   155.4  
Other Liabilities, Current 195.2   195.2   256.8  
Deferred tax liabilities, net 24.5   24.5   63.2  
Retained earnings 2,913.3   2,913.3   2,649.0  
Accumulated Other Comprehensive Income (Loss), Net of Tax (425.3)   (425.3)   (340.8)  
Revenue Before Reimbursements 2,213.7 $ 1,980.7 6,268.1 $ 5,471.5    
Reimbursement Revenues 1,756.1 1,541.5 5,160.6 4,638.7    
Revenue 3,969.8 3,522.2 11,428.7 10,110.2    
Compensation and benefits 1,287.0 1,155.4 3,624.7 3,199.4    
Operating, administrative and other 689.4 642.3 2,124.5 1,852.5    
Cost of Reimbursable Expenses 1,756.1 1,541.5 5,160.6 4,638.7    
Operating Income (Loss) 190.9 137.8 394.5 284.0    
Other Nonoperating Income (Expense) (0.3) (0.3) 3.9 0.7    
Provision for income taxes 45.6 36.0 96.7 73.1    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 136.1 $ 99.2 $ 288.5 $ 201.8    
Basic earnings per common share (in dollars per share) $ 2.96 $ 2.17 $ 6.22 $ 4.41    
Diluted earnings per common share (in dollars per share) $ 2.93 $ 2.15 $ 6.16 $ 4.37    
Transition Adjustments [Member]            
Cost of Reimbursable Expenses   $ 13.3   $ 43.5    
Calculated under Revenue Guidance in Effect before Topic 606 [Member]            
Trade receivables, net of allowances         2,118.1  
Notes and other receivables         393.6  
Prepaid Expense and Other Assets, Current         257.7  
Long-term receivables         168.6  
Other Assets, Noncurrent         97.8  
Accounts Payable and Accrued Liabilities, Current         1,011.6  
Accrued compensation & benefits         1,309.0  
Short-term contract liabilities and deferred income         158.9  
Other Liabilities, Current         263.8  
Deferred tax liabilities, net         23.9  
Retained earnings         2,552.8  
Accumulated Other Comprehensive Income (Loss), Net of Tax         (341.8)  
Revenue Before Reimbursements   1,947.0   5,396.9    
Revenue   1,947.0   5,396.9    
Compensation and benefits   1,132.3   3,146.6    
Operating, administrative and other   651.4   1,870.0    
Operating Income (Loss)   118.1   244.7    
Other Nonoperating Income (Expense)   0.0   0.0    
Provision for income taxes   28.2   57.3    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   $ 87.5   $ 177.5    
Basic earnings per common share (in dollars per share)   $ 1.91   $ 3.88    
Diluted earnings per common share (in dollars per share)   $ 1.89   $ 3.84    
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]            
Trade receivables, net of allowances         (378.7)  
Notes and other receivables         (8.3)  
Accounts Receivable, Reimbursed by Client, Current         1,263.3  
Contract with Customer, Asset, Net, Current         178.4  
Prepaid Expense and Other Assets, Current         131.4  
Long-term receivables         (3.9)  
Other Assets, Noncurrent         57.7  
Accounts Payable and Accrued Liabilities, Current         (18.5)  
Accounts Payable, Reimbursed by Client, Current         1,022.6  
Accrued compensation & benefits         110.1  
Short-term contract liabilities and deferred income         (3.5)  
Other Liabilities, Current         (7.0)  
Deferred tax liabilities, net         39.3  
Retained earnings         96.2  
Accumulated Other Comprehensive Income (Loss), Net of Tax         $ 1.0  
Revenue Before Reimbursements   $ 33.7   $ 74.6    
Reimbursement Revenues   1,541.5   4,638.7    
Revenue   1,575.2   4,713.3    
Compensation and benefits   23.4   52.1    
Operating, administrative and other   (9.1)   (17.5)    
Cost of Reimbursable Expenses   1,541.5   4,638.7    
Operating Income (Loss)   19.4   40.0    
Other Nonoperating Income (Expense)   0.0   0.0    
Provision for income taxes   7.8   15.8    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   $ 11.7   $ 24.3    
Basic earnings per common share (in dollars per share)   $ 0.26   $ 0.53    
Diluted earnings per common share (in dollars per share)   $ 0.26   $ 0.53    
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]            
Retained earnings           $ 62.6
Adjustments for New Accounting Pronouncement [Member]            
Revenue Before Reimbursements   $ 0.0   $ 0.0    
Reimbursement Revenues   0.0   0.0    
Revenue   0.0   0.0    
Compensation and benefits   (0.3)   0.7    
Operating, administrative and other   0.0   0.0    
Cost of Reimbursable Expenses   0.0   0.0    
Operating Income (Loss)   0.3   (0.7)    
Other Nonoperating Income (Expense)   (0.3)   0.7    
Provision for income taxes   0.0   0.0    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   $ 0.0   $ 0.0    
Basic earnings per common share (in dollars per share)   $ 0.00   $ 0.00    
Diluted earnings per common share (in dollars per share)   $ 0.00   $ 0.00