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Significant Portions of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred tax assets |  |
Tax loss carryforwards | $ 854.5 | $ 883.3
Postretirement benefits | 695.7 | 791.3
Foreign tax credit carryforwards | 263.2 | 245.5
Other tax credit carryforwards | 86.7 | 88.0
Deferred revenue | 65.7 | 60.5
Employee benefits and compensation | 49.9 | 44.6
Purchased capitalized software | 39.5 | 39.3
Depreciation | 36.8 | 34.9
Warranty, bad debts and other reserves | 14.1 | 12.8
Capitalized costs | 13.0 | 16.3
Capitalized research and development | 3.2 | 36.0
Other | 39.7 | 29.5
Deferred Tax Assets, Gross, Total | 2,162.0 | 2,282.0
Valuation allowance | (2,024.9) | (2,107.8)
Total deferred tax assets | 137.1 | 174.2
Other | 22.7 | 37.9
Total deferred tax liabilities | 22.7 | 37.9
Net deferred tax assets | $ 114.4 | $ 136.3

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