XML 461 R78.htm IDEA: XBRL DOCUMENT v3.20.2
Revenue from contracts with customers - Significant estimates and judgments (Details)
£ in Millions
12 Months Ended
Aug. 01, 2015
GBP (£)
item
Jun. 30, 2020
GBP (£)
Estimates and judgments    
Estimated Premier League rebate for 2019/2020 season due to broadcasters   £ 14.0
adidas    
Estimates and judgments    
Term of agreement (in years) 10 years  
Minimum guarantee payable £ 750.0  
Number of consecutive seasons of non-participation in Champions League that would impact guarantee payable by adidas | item 2  
Maximum increase in guarantee payable per year £ 4.0  
Maximum possible percentage of reduction in guarantee per year 30.00%