Years ended June 30 | 2013 | 2012 | 2011 | |||||
U.S. federal statutory income tax rate | 35.0 | % | 35.0 | % | 35.0 | % | ||
Country mix impacts of foreign operations | (7.6 | )% | (8.1 | )% | (8.2 | )% | ||
Changes in uncertain tax positions | (1.8 | )% | (1.3 | )% | (3.6 | )% | ||
Impairment adjustments | 0.6 | % | 3.7 | % | — | % | ||
Holding gain on joint venture buy-out | (1.4 | )% | — | % | — | % | ||
Other | (1.6 | )% | (2.2 | )% | (1.2 | )% | ||
EFFECTIVE INCOME TAX RATE | 23.2 | % | 27.1 | % | 22.0 | % | ||