Unapproved Change Orders, and Claims, Against Clients and Estimated Recoveries of Claims Against Suppliers and Subcontractors (Rollforward) (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
Unapproved Change Orders [Roll Forward] | ||
Amounts included in project estimates-at-completion at January 1, | $ 973 | $ 924 |
Increase (decrease), including foreign currency effect | 16 | (17) |
Amounts included in project estimates-at-completion at March 31, | 989 | 907 |
Amounts recognized over time based on progress at March 31, | $ 965 | $ 843 |