We define segment profit as segment revenue less costs of services, segment selling, general and administrative, depreciation and amortization, and other income (excluding the movement in foreign currency exchange rates on our foreign currency denominated assets and liabilities and the related economic hedges). We do not allocate to our segments certain operating expenses managed at the corporate level. These unallocated costs include certain corporate function costs, stock-based compensation expense, pension and OPEB actuarial and settlement gains and losses, restructuring costs, transaction, separation and integration-related costs and amortization of acquired intangible assets.