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Share-based Compensation and Equity - Special Cash Distribution (Details) - USD ($)
12 Months Ended
Oct. 24, 2022
Sep. 14, 2022
Dec. 28, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 03, 2021
Nov. 01, 2021
Oct. 06, 2021
Sep. 15, 2021
Aug. 12, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Amount receivable, noncurrent   $ 71,700,000                
Dividends payable       $ 3,930,000 $ 6,932,000          
Decrease in stock option price (in dollars per share) $ 0.68 $ 0.83                
Cash to be paid upon vesting (in dollars per share) 0.68 0.83                
Dividends payable               $ 1,270,000,000    
Dividends paid     $ 105,000,000              
Discontinued Operations, Disposed of by Sale | Walden e-Learning, LLC                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Amount receivable, noncurrent                   $ 74,000,000
Restricted cash held in escrow, released                   $ 83,600,000
Common Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Dividends (in dollars per share) 0.68 0.83       $ 0.58 $ 7.01      
Common stock, par value ( in dollars per share) $ 0.004 $ 0.004   $ 0.004 $ 0.004 $ 0.004     $ 0.004  
Dividends payable $ 112,000,000 $ 136,600,000                
Dividends payable on vested stock units       $ 6,932,000