The following table summarizes the Company's restructuring charges, net of revisions, by reportable operating segment and Corporate & Other for the year ended December 31, 2013, and the cumulative amounts relating to the restructuring programs that were in progress during 2013 and initiated at various dates between 2009 and 2013.
| Cumulative Restructuring Expense Incurred To Date On | |||||||||||||
| 2013 | In-Progress Restructuring Programs | ||||||||||||
| Total Restructuring | |||||||||||||
| Charges, net | |||||||||||||
| (Millions) | revisions | Severance | Other | Total | |||||||||
| USCS | $ | (7) | $ | 71 | $ | 6 | $ | 77 | |||||
| ICS | (8) | 110 | 1 | 111 | |||||||||
| GCS | (4) | 204 | 18 | 222 | |||||||||
| GNMS | 7 | 55 | ― | 55 | |||||||||
| Corporate & Other | 8 | 89 | 68 | 157 | (a) | ||||||||
| Total | $ | (4) | $ | 529 | $ | 93 | $ | 622 | (b) | ||||