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Cash and Equivalents
6 Months Ended
Jun. 30, 2021
Cash and Cash Equivalents [Abstract]  
Cash and Equivalents Cash and EquivalentsWe consider all highly liquid investments with an original maturity of three months or less to be cash equivalents. Cash and equivalents include cash balances held by our wholly owned subsidiaries as well as cash held by joint ventures that we consolidate. Joint venture and the Aspire project cash balances are limited to specific project activities and are not available for other projects, general cash needs or distribution to us without approval of the board of directors of the respective entities. We expect to use this cash for project costs and distributions of earnings.
The components of our cash and equivalents balance are as follows:
 June 30, 2021
Dollars in millionsInternational (a)Domestic (b)Total
Operating cash and equivalents$245 $95 $340 
Short-term investments (c)12 — 12 
Cash and equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities131 — 131 
Total$388 $95 $483 

 December 31, 2020
Dollars in millionsInternational (a)Domestic (b)Total
Operating cash and equivalents$228 $54 $282 
Short-term investments (c)— 
Cash and equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities151 — 151 
Total$382 $54 $436 
(a)Includes deposits held in non-U.S. operating accounts.
(b)Includes U.S. dollar and foreign currency deposits held in operating accounts that constitute onshore cash for tax purposes but may reside either in the U.S. or in a foreign country.
(c)Includes time deposits, money market funds, and other highly liquid short-term investments.