(in millions, except percentages) | 2013 | 2012 | 2011 | ||||||||||||||||||
Tax provision at the U.S. federal statutory rate | $ | 3,120 | 35.0 | % | $ | 3,018 | 35.0 | % | $ | 2,785 | 35.0 | % | |||||||||
State income taxes, net of federal benefit | 126 | 1.4 | 143 | 1.7 | 136 | 1.7 | |||||||||||||||
Settlement of state exams, net of federal benefit | 1 | — | 2 | — | (29 | ) | (0.4 | ) | |||||||||||||
Tax-exempt investment income | (53 | ) | (0.6 | ) | (59 | ) | (0.7 | ) | (63 | ) | (0.8 | ) | |||||||||
Non-deductible compensation | 39 | 0.5 | 22 | 0.2 | 10 | 0.1 | |||||||||||||||
Other, net | 9 | 0.1 | (30 | ) | (0.3 | ) | (22 | ) | (0.2 | ) | |||||||||||
Provision for income taxes | $ | 3,242 | 36.4 | % | $ | 3,096 | 35.9 | % | $ | 2,817 | 35.4 | % |