Operating Expenses (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
|
Salary and service costs | $ 2,598.8 | $ 2,541.3 | $ 5,132.3 | $ 4,975.8 |
Office and general expenses | 515.2 | 513.3 | 1,008.8 | 1,023.5 |
Operating expenses | $ 3,114.0 | $ 3,054.6 | $ 6,141.1 | $ 5,999.3 |