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Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2018
Accounting Policies [Abstract] |
The Cumulative Effect of Changes to the Balance Sheet Related to the Adoption of ASC 606 | The cumulative effect of the changes made to our consolidated January 1, 2018 balance sheet related to the adoption of ASC 606 were as follows (in millions):
| As Reported December 31, 2017 |  | Adjustment |  | As Adjusted January 1, 2018
Assets: |  |  |  |  |
Inventories, net (1) | $ | 458 |  |  | $ | (3 | ) |  | $ | 455 |
Prepaid expenses and other current assets (2) | 24 |  |  | 7 |  |  | 31 |
Long-term deferred income taxes (3) | 119 |  |  | (5 | ) |  | 114 |
Other long-term assets (4) | 65 |  |  | 12 |  |  | 77 |
Liabilities: |  |  |  |  |
Deferred revenue (5) | 186 |  |  | (2 | ) |  | 184 |
Long-term deferred revenue (6) | 148 |  |  | (6 | ) |  | 142 |
Stockholders’ Equity: |  |  |  |  |
Retained earnings | 1,248 |  |  | 19 |  |  | 1,267 |
(1) | Reflects an adjustment of $(3) million related to changes in revenue recognition patterns.
(2) | Reflects an adjustment of $7 million related to changes in revenue recognition patterns.
(3) | Reflects the income tax effect of the adjustments made related to the adoption of ASC 606.
(4) | Reflects an adjustment of $12 million related to the capitalization of costs to obtain contracts (primarily comprised of sales commissions associated with longer term support service contracts).
(5) | Reflects an adjustment of $(3) million related to reallocation of revenue between performance obligations and $1 million related to changes in the timing of revenue recognition.
(6) | Reflects an adjustment of $(6) million related to reallocation of revenue between performance obligations.

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
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