The components of income tax expense for the years ended December 31 included in the Consolidated Statements of Income were as follows:
| (Millions) | 2016 | 2015 | 2014 | |||||||||
| Current income tax expense: | ||||||||||||
| U.S. federal | $ | 2,179 | $ | 2,107 | $ | 2,136 | ||||||
| U.S. state and local | 272 | 335 | 264 | |||||||||
| Non-U.S. | 342 | 416 | 412 | |||||||||
| Total current income tax expense | 2,793 | 2,858 | 2,812 | |||||||||
| Deferred income tax (benefit) expense: | ||||||||||||
| U.S. federal | (45) | (23) | 352 | |||||||||
| U.S. state and local | (8) | (5) | 39 | |||||||||
| Non-U.S. | (52) | (55) | (97) | |||||||||
| Total deferred income tax (benefit) expense | (105) | (83) | 294 | |||||||||
| Total income tax expense | $ | 2,688 | $ | 2,775 | $ | 3,106 | ||||||