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Significant Accounting Policies (Components of Other Current Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Accounting Policies [Abstract]      
Current maturities of long-term debt $ 27   $ 22
Reserve for estimated losses on uncompleted contracts 10   6
Retainage payable 41   33
Income taxes payable 25   30
Value-added tax payable 36   33
Dividend payable 11   11
Other miscellaneous liabilities 36   44
Total other current liabilities $ 186 $ 174 $ 179