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Summary of Significant Accounting Policies (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2018 USD ($) weeks | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Sep. 30, 2018 weeks | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Jan. 01, 2018 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of weeks in each of the first three quarters of each fiscal year | weeks |  | 16 |  |  |  |  |  |  |  | 12 |  |  |  |  |
Business Acquisitions, Purchase Price Allocation, Year of Acquisition, Description |  |  |  |  |  |  |  |  |  |  | $ 77.0 |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  |  | 66.0 | $ 0.0 | $ 0.0 |  |
Deferred Revenue |  | $ 414.0 |  |  |  |  |  |  |  |  | 414.0 |  |  |  | $ 392.0
Future lease payments due from franchisees on a nominal basis |  | 1,100.0 |  |  |  |  |  |  |  |  | 1,100.0 |  |  |  |
Reclassification of Retained Earnings to Common Stock for Share Repurchase |  |  |  |  |  |  |  |  |  |  | 2,356.0 | 1,915.0 | 5,399.0 |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 5,688.0 |  | 6,356.0 |  |
Deferred Revenue, Revenue Recognized |  |  |  |  |  |  |  |  |  |  | (66.0) |  |  |  |
Deferred Revenue, Additions |  |  |  |  |  |  |  |  |  |  | 102.0 |  |  |  |
Retained Earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Stock Option and SARs Exercises, Value |  |  |  |  |  |  |  |  |  |  |  | 20.0 |  |  |
Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 477.0 | $ 499.0 | $ 512.0 | $ 512.0 | $ 890.0 | $ 871.0 | $ 909.0 | $ 902.0 |  | 2,000.0 | 3,572.0 | 4,189.0 |  |
Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 372.0 | 287.0 | 272.0 | 275.0 |  |  |  |  |  | 1,206.0 | 0.0 | 0.0 |  |
UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 54.0 |  |  |  |
UNITED STATES | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 1,143.0 |  |  |  |
UNITED STATES | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 994.0 |  |  |  |
UNITED STATES | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 706.0 |  |  |  |
CHINA | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 260.0 |  |  |  |
Other, Outside the U.S. and China [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 77.0 |  |  |  |
Other, Outside the U.S. and China [Member] | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 857.0 |  |  |  |
Other, Outside the U.S. and China [Member] | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 1,097.0 |  |  |  |
Other, Outside the U.S. and China [Member] | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 500.0 |  |  |  |
KFC Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 2,644.0 |  |  |  |
KFC Global Division [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 23.0 |  |  |  |
KFC Global Division [Member] | UNITED STATES | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 72.0 |  |  |  |
KFC Global Division [Member] | UNITED STATES | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 171.0 |  |  |  |
KFC Global Division [Member] | UNITED STATES | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 9.0 |  |  |  |
KFC Global Division [Member] | CHINA | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 201.0 |  |  |  |
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 74.0 |  |  |  |
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 822.0 |  |  |  |
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 825.0 |  |  |  |
KFC Global Division [Member] | Other, Outside the U.S. and China [Member] | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 447.0 |  |  |  |
Pizza Hut Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 988.0 |  |  |  |
Pizza Hut Global Division [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 4.0 |  |  |  |
Pizza Hut Global Division [Member] | UNITED STATES | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 37.0 |  |  |  |
Pizza Hut Global Division [Member] | UNITED STATES | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 284.0 |  |  |  |
Pizza Hut Global Division [Member] | UNITED STATES | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 269.0 |  |  |  |
Pizza Hut Global Division [Member] | CHINA | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 59.0 |  |  |  |
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 3.0 |  |  |  |
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 32.0 |  |  |  |
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 248.0 |  |  |  |
Pizza Hut Global Division [Member] | Other, Outside the U.S. and China [Member] | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 52.0 |  |  |  |
Taco Bell Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 2,056.0 |  |  |  |
Taco Bell Global Division [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 27.0 |  |  |  |
Taco Bell Global Division [Member] | UNITED STATES | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 1,034.0 |  |  |  |
Taco Bell Global Division [Member] | UNITED STATES | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 539.0 |  |  |  |
Taco Bell Global Division [Member] | UNITED STATES | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 428.0 |  |  |  |
Taco Bell Global Division [Member] | CHINA | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 0.0 |  |  |  |
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income |  |  |  |  |  |  |  |  |  |  | 0.0 |  |  |  |
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Product [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 3.0 |  |  |  |
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Franchise [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 24.0 |  |  |  |
Taco Bell Global Division [Member] | Other, Outside the U.S. and China [Member] | Advertising [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  |  |  |  |  |  |  | 1.0 |  |  |  |
Foreign Currency Gain (Loss) and Refranchising Gain (Loss) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue, Period Increase (Decrease) | [1] |  |  |  |  |  |  |  |  |  | (14.0) |  |  |  |
1 year [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue, Revenue Expected to be Recognized |  | 60.0 |  |  |  |  |  |  |  |  | 60.0 |  |  |  |
2 years [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue, Revenue Expected to be Recognized |  | 55.0 |  |  |  |  |  |  |  |  | 55.0 |  |  |  |
3 years [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue, Revenue Expected to be Recognized |  | 51.0 |  |  |  |  |  |  |  |  | 51.0 |  |  |  |
4 years [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue, Revenue Expected to be Recognized |  | 47.0 |  |  |  |  |  |  |  |  | 47.0 |  |  |  |
5 years [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue, Revenue Expected to be Recognized |  | 42.0 |  |  |  |  |  |  |  |  | 42.0 |  |  |  |
Thereafter 5 years [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue, Revenue Expected to be Recognized |  | 159.0 |  |  |  |  |  |  |  |  | 159.0 |  |  |  |
Incremental Advertising [Member] | KFC Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs associated with KFC U.S. Acceleration Agreement |  |  |  |  |  |  |  |  |  |  | 10.0 | 20.0 | 20.0 | $ 10.0 |
Incremental Advertising [Member] | Pizza Hut Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs associated with PH U.S. Acceleration Agreement |  |  |  |  |  |  |  |  |  |  | 12.5 |  |  |  |
Incremental Advertising [Member] | Franchise and property expenses [Member] | Pizza Hut Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs associated with PH U.S. Acceleration Agreement |  |  |  |  |  |  |  |  |  |  | 12.5 | 25.0 |  |  |
Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising Expense |  |  |  |  |  |  |  |  |  |  | 131.0 | 245.0 | 260.0 |  |
Revenues |  | $ 1,558.0 | $ 1,391.0 | $ 1,368.0 | $ 1,371.0 | $ 1,577.0 | $ 1,436.0 | $ 1,448.0 | $ 1,417.0 |  | 5,688.0 | 5,878.0 | 6,356.0 |  |
Continuing Operations [Member] | Advertising Cooperatives [Domain] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising Expense |  |  |  |  |  |  |  |  |  |  | 1,035.0 |  |  |  |
Continuing Operations [Member] | KFC Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | [2] |  |  |  |  |  |  |  |  |  | 2,644.0 | 3,110.0 | 3,225.0 |  |
Continuing Operations [Member] | Pizza Hut Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | [2] |  |  |  |  |  |  |  |  |  | 988.0 | 893.0 | 1,108.0 |  |
Continuing Operations [Member] | Taco Bell Global Division [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | [2] |  |  |  |  |  |  |  |  |  | $ 2,056.0 | $ 1,880.0 | $ 2,025.0 |  |
[1] | Includes impact of foreign currency translation as well as the recognition of deferred franchise fees into Refranchising (gain) loss upon the modification of existing franchise agreements when entering into master franchise agreements.
[2] | U.S. revenues included in the combined KFC, Pizza Hut and Taco Bell Divisions totaled $2.9 billion in 2018, $2.8 billion in 2017 and $3.1 billion in 2016.

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