| ($ in millions) | |||||||||||||||||||||||||||
| Defined Benefit Pension Plans | Nonpension Postretirement Benefit Plans | ||||||||||||||||||||||||||
| U.S. Plans | Non-U.S. Plans | U.S. Plan | Non-U.S. Plans | ||||||||||||||||||||||||
| 2013 | 2012 | 2013 | 2012 | 2013 | 2012 | 2013 | 2012 | ||||||||||||||||||||
| Net loss at January 1 | $ | 19,488 | $ | 18,561 | $ | 22,188 | $ | 18,309 | $ | 806 | $ | 734 | $ | 269 | $ | 211 | |||||||||||
| Current period loss/(gain) | (3,989) | 2,258 | (814) | 4,905 | (480) | 104 | (85) | 75 | |||||||||||||||||||
| Curtailments and settlements | — | — | 3 | 2 | — | — | 0 | — | |||||||||||||||||||
| Amortization of net loss included in | |||||||||||||||||||||||||||
| net periodic (income)/cost | (1,790) | (1,331) | (1,600) | (1,027) | (21) | (32) | (23) | (17) | |||||||||||||||||||
| Net loss at December 31 | $ | 13,709 | $ | 19,488 | $ | 19,777 | $ | 22,188 | $ | 304 | $ | 806 | $ | 161 | $ | 269 | |||||||||||
| Prior service costs/(credits) at January 1 | $ | 130 | $ | 139 | $ | (614) | $ | (768) | $ | — | $ | — | $ | (6) | $ | (10) | |||||||||||
| Current period prior service costs/(credits) | — | — | 0 | — | 15 | — | (31) | — | |||||||||||||||||||
| Amortization of prior service (costs)/ | |||||||||||||||||||||||||||
| credits included in net periodic | |||||||||||||||||||||||||||
| (income)/cost | (10) | (10) | 119 | 154 | — | — | 5 | 4 | |||||||||||||||||||
| Prior service costs/(credits) at | |||||||||||||||||||||||||||
| December 31 | $ | 120 | $ | 130 | $ | (496) | $ | (614) | $ | 15 | $ | — | $ | (32) | $ | (6) | |||||||||||
| Transition (assets)/liabilities at January 1 | $ | — | $ | — | $ | 0 | $ | (0) | $ | — | $ | — | $ | 0 | $ | 0 | |||||||||||
| Amortization of transition assets/ | |||||||||||||||||||||||||||
| (liabilities) included in net periodic | |||||||||||||||||||||||||||
| (income)/cost | — | — | 0 | 0 | — | — | 0 | (0) | |||||||||||||||||||
| Transition (assets)/liabilities at | |||||||||||||||||||||||||||
| December 31 | $ | — | $ | — | $ | 0 | $ | (0) | $ | — | $ | — | $ | 0 | $ | 0 | |||||||||||
| Total loss recognized in accumulated | |||||||||||||||||||||||||||
| other comprehensive income/(loss)* | $ | 13,829 | $ | 19,618 | $ | 19,281 | $ | 21,574 | $ | 319 | $ | 806 | $ | 129 | $ | 263 | |||||||||||
* See note L, “Equity Activity,” on pages 116 through 118 for the total change in AOCI, and the Consolidated Statement of Comprehensive Income for the components of net periodic (income)/cost, including the related tax effects, recognized in OCI for the retirement-related benefit plans.