| 2013 | 2012 | 2011 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| |
In millions |
|||||||||
|
Balance at beginning of year |
$ | 10,223 | $ | 9,057 | $ | 8,755 | ||||
|
Charged to expenses |
1,644 | 865 | 315 | |||||||
|
Other comprehensive income, currency translation and other |
(477 | ) | 301 | (13 | ) | |||||
|
Balance at end of year |
$ | 11,390 | $ | 10,223 | $ | 9,057 | ||||