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Revenue Recognition - Summary of Contract Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Change In Contract Liabilities [Roll Forward] |  |  |  |
Contract liability balance, beginning of period |  |  | $ 89 |
Liabilities recognized during the period |  |  | 47 |
Amounts recognized in revenue from beginning balance |  |  | (43) |
Contract liability balance, end of period | $ 93 |  | 93 |
Accounting Standards Update 2014-09 [Member] | Lottery | Instant Products [Member] |  |  |  |
Change In Contract Liabilities [Roll Forward] |  |  |  |
Amounts recognized in revenue from beginning balance | $ (31) | $ (21) | $ (50) | $ (40)

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044 + Details
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