The income tax expense is primarily comprised of income tax expense of approximately $57 million at the statutory rate of 21%, $17 million of federal income tax expense related to an adjustment to differential membership interests as a result of the change in federal corporate income tax rates due to tax reform (see Note 2 - Noncontrolling Interests) and $10 million of state income taxes, partly offset by income tax benefits of $67 million related to the disposal of Canadian Holdings and $17 million of income tax attributable to noncontrolling interests.