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Taxation (U.S. Corporate Income Tax) (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax and Tax Rate [Line Items]          
Statutory income tax rate 25.00% 25.00% 25.00%    
Thereafter tax years [Member]          
Income Tax and Tax Rate [Line Items]          
Statutory income tax rate       21.00%  
Prior tax years [Member]          
Income Tax and Tax Rate [Line Items]          
Statutory income tax rate         35.00%