2013 | 2012 | 2011 | ||||||
Statutory U.S. federal income tax rate | 35.0 | % | 35.0 | % | 35.0 | % | ||
Tax on international activities | (5.8 | )% | (6.4 | )% | (4.4 | )% | ||
Tax audit settlements | (0.4 | )% | (3.4 | )% | (0.9 | )% | ||
Other | (1.9 | )% | (0.4 | )% | (0.7 | )% | ||
Effective income tax rate | 26.9 | % | 24.8 | % | 29.0 | % | ||