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Accounting Standards (Detail) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Revenue |  |  |  |  |  |  |  |  |
Revenue |  | $ 667.4 |  | $ 666.2 |  | $ 1,375.8 | $ 1,330.7 |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Cost of revenue |  | 514.5 |  | 547.5 | [1] | 1,021.7 | 1,073.4 | [1] |
Selling, general and administrative |  | 92.7 |  | 111.4 | [1] | 183.6 | 216.4 | [1] |
Operating income |  | 54.0 |  | (3.5) | [1] | 155.8 | 18.3 |  |
Income before income taxes |  | 20.3 |  | (42.3) |  | 82.9 | (59.1) |  |
Provision for income taxes |  | 14.3 |  | (3.8) |  | 35.2 | 9.1 |  |
Consolidated net income |  | 6.0 |  | (38.5) |  | 47.7 | (68.2) |  |
Net income attributable to Unisys Corporation |  | 3.8 |  | (42.0) |  | 44.4 | (74.7) |  |
Assets |  |  |  |  |  |  |  |  |
Accounts receivable, net current |  | 484.0 |  |  |  | 484.0 |  |  | $ 503.3
Contract assets |  | 38.3 |  |  |  | 38.3 |  |  | 0.0
Inventories |  | 22.7 |  |  |  | 22.7 |  |  |
Prepaid expenses and other current assets |  | 117.6 |  |  |  | 117.6 |  |  | 126.2
Outsourcing assets, net |  | 208.8 |  |  |  | 208.8 |  |  | 202.3
Deferred income taxes - long-term |  | 106.5 |  |  |  | 106.5 |  |  | 119.9
Other long-term assets |  | 194.3 |  |  |  | 194.3 |  |  | 190.6
Total assets |  | 2,370.9 |  |  |  | 2,370.9 |  |  | 2,542.4
Liabilities |  |  |  |  |  |  |  |  |
Deferred revenue - current |  | 284.6 |  |  |  | 284.6 |  |  | 327.5
Other accrued liabilities - current |  | 319.1 |  |  |  | 319.1 |  |  | 391.5
Long-term deferred revenue |  | 177.3 |  |  |  | 177.3 |  |  | 159.0
Other long-term liabilities |  | 79.0 |  |  |  | 79.0 |  |  | 100.0
Equity |  |  |  |  |  |  |  |  |
Accumulated deficit |  | (1,940.1) |  |  |  | (1,940.1) |  |  | (1,963.1)
Total liabilities and deficit |  | 2,370.9 |  |  |  | 2,370.9 |  |  | $ 2,542.4
Services |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |
Revenue |  | 586.7 |  | 574.8 |  | 1,155.2 | 1,160.1 |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Cost of revenue |  | 484.2 |  | 510.8 | [1] | 955.1 | 997.2 | [1] |
Operating income |  | 18.6 |  | (9.4) |  | 35.7 | 17.9 |  |
Technology |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |
Revenue |  | 80.7 |  | 91.4 |  | 220.6 | 170.6 |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Cost of revenue |  | 30.3 |  | 36.7 | [1] | 66.6 | 76.2 | [1] |
Operating income |  | 38.2 |  | 34.4 |  | 120.2 | 47.4 |  |
Technology | Software License Extensions and Renewals |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |
Revenue | $ 53.0 |  | $ 53.0 |  |  | 53.0 |  |  |
Balances Without Adoption of Topic 606 |  |  |  |  |  |  |  |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Selling, general and administrative |  | 92.9 |  |  |  | 184.0 |  |  |
Operating income |  | 35.1 |  |  |  | 61.8 |  |  |
Income before income taxes |  | 1.4 |  |  |  | (11.1) |  |  |
Provision for income taxes |  | 14.4 |  |  |  | 25.8 |  |  |
Consolidated net income |  | (13.0) |  |  |  | (36.9) |  |  |
Net income attributable to Unisys Corporation |  | (15.2) |  |  |  | (40.2) |  |  |
Assets |  |  |  |  |  |  |  |  |
Accounts receivable, net current |  | 510.6 |  |  |  | 510.6 |  |  |
Contract assets |  | 0.0 |  |  |  | 0.0 |  |  |
Inventories |  | 22.8 |  |  |  | 22.8 |  |  |
Prepaid expenses and other current assets |  | 118.8 |  |  |  | 118.8 |  |  |
Outsourcing assets, net |  | 212.2 |  |  |  | 212.2 |  |  |
Deferred income taxes - long-term |  | 108.2 |  |  |  | 108.2 |  |  |
Other long-term assets |  | 171.6 |  |  |  | 171.6 |  |  |
Total assets |  | 2,342.8 |  |  |  | 2,342.8 |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deferred revenue - current |  | 316.6 |  |  |  | 316.6 |  |  |
Other accrued liabilities - current |  | 307.5 |  |  |  | 307.5 |  |  |
Long-term deferred revenue |  | 186.7 |  |  |  | 186.7 |  |  |
Other long-term liabilities |  | 84.4 |  |  |  | 84.4 |  |  |
Equity |  |  |  |  |  |  |  |  |
Accumulated deficit |  | (2,003.4) |  |  |  | (2,003.4) |  |  |
Total liabilities and deficit |  | 2,342.8 |  |  |  | 2,342.8 |  |  |
Balances Without Adoption of Topic 606 | Services |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |
Revenue |  | 581.4 |  |  |  | 1,152.7 |  |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Cost of revenue |  | 481.1 |  |  |  | 953.8 |  |  |
Balances Without Adoption of Topic 606 | Technology |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |
Revenue |  | 64.5 |  |  |  | 127.6 |  |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Cost of revenue |  | 30.5 |  |  |  | 65.9 |  |  |
Accounting Standards Update 2017-07 |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Net periodic benefit cost, other than service cost |  |  |  | $ 21.3 |  |  | $ 45.8 |  |
Accounting Standards Update 2014-09 | Adjustments |  |  |  |  |  |  |  |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Selling, general and administrative |  | 0.2 |  |  |  | 0.4 |  |  |
Operating income |  | (18.9) |  |  |  | (94.0) |  |  |
Income before income taxes |  | (18.9) |  |  |  | (94.0) |  |  |
Provision for income taxes |  | 0.1 |  |  |  | (9.4) |  |  |
Consolidated net income |  | (19.0) |  |  |  | (84.6) |  |  |
Net income attributable to Unisys Corporation |  | (19.0) |  |  |  | (84.6) |  |  |
Assets |  |  |  |  |  |  |  |  |
Accounts receivable, net current |  | 26.6 |  |  |  | 26.6 |  |  |
Contract assets |  | (38.3) |  |  |  | (38.3) |  |  |
Inventories |  | 0.1 |  |  |  | 0.1 |  |  |
Prepaid expenses and other current assets |  | 1.2 |  |  |  | 1.2 |  |  |
Outsourcing assets, net |  | 3.4 |  |  |  | 3.4 |  |  |
Deferred income taxes - long-term |  | 1.7 |  |  |  | 1.7 |  |  |
Other long-term assets |  | (22.7) |  |  |  | (22.7) |  |  |
Total assets |  | (28.1) |  |  |  | (28.1) |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Deferred revenue - current |  | 32.0 |  |  |  | 32.0 |  |  |
Other accrued liabilities - current |  | (11.6) |  |  |  | (11.6) |  |  |
Long-term deferred revenue |  | 9.4 |  |  |  | 9.4 |  |  |
Other long-term liabilities |  | 5.4 |  |  |  | 5.4 |  |  |
Equity |  |  |  |  |  |  |  |  |
Accumulated deficit |  | (63.3) |  |  |  | (63.3) |  |  |
Total liabilities and deficit |  | (28.1) |  |  |  | (28.1) |  |  |
Accounting Standards Update 2014-09 | Adjustments | Services |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |
Revenue |  | (5.3) |  |  |  | (2.5) |  |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Cost of revenue |  | (3.1) |  |  |  | (1.3) |  |  |
Accounting Standards Update 2014-09 | Adjustments | Technology |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |
Revenue |  | (16.2) |  |  |  | (93.0) |  |  |
Cost of revenue: |  |  |  |  |  |  |  |  |
Cost of revenue |  | $ 0.2 |  |  |  | $ (0.7) |  |  |
Accounting Standards Update 2014-09 | Accumulated Deficit |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |
Increase to accumulated deficit | $ 21.4 |  |  |  |  |  |  |  |
[1] | Amounts were changed to conform to the current-year presentation. See Note 3.

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