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Revenue - Contract Balances (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Contract Assets (Unearned Income)          
Current contract assets $ 161   $ 161   $ 154
Long-term contract assets 15   15   8
Current unearned income (75)   (75)   (82)
Long-term unearned income (44)   (44)   (48)
Net Contract Assets 57   57   32
Accounts receivable, net 653   653   $ 699
Revenue recognized related to unearned income $ 14 $ 11 67 $ 99  
Midas Sale          
Contract Assets (Unearned Income)          
Revenue recognized related to unearned income     $ 7