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Stockholders' Equity and Share-Based Awards - Additional Information (Detail) - USD ($) |  | 6 Months Ended
--- | --- | ---
Jun. 11, 2018 | Jun. 30, 2018
Share Repurchase Program [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Increase in authorized amount | $ 2,500,000,000 |
Stock repurchase program, authorized amount |  | $ 3,600,000,000
Share Repurchase Program [Member] | Common Stock [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock repurchase program, shares repurchased |  | 0
Stock repurchase program, value repurchased |  | $ 0
Performance Based Restricted Stock Units Rsu [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of stock units awarded |  | 1,100,000
Share-based compensation arrangement by share-based payment award, award vesting period |  | 3 years
Aggregate grant date fair value |  | $ 35,100,000
Time-Based RSU's [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of stock units awarded |  | 1,500,000
Share-based compensation arrangement by share-based payment award, award vesting period |  | 3 years
Aggregate grant date fair value |  | $ 41,800,000
Share-based awards vesting terms |  | Vest in equal installments over a three-year period.
Employees Awards [member] | Discontinued Operations [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of stock units awarded |  | 100,000
Aggregate grant date fair value |  | $ 3,300,000

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- Definition Increase in amount authorized under the Company's board-approved share repurchase program. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Net number of non-option equity instruments granted to participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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