v3.6.0.2
Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating activities      
Net earnings $ 5,302 $ 3,605 $ 3,614
Adjustments to reconcile net earnings to net cash provided by operating activities      
Depreciation and amortization 1,215 1,026 994
Stock-based compensation 149 138 164
Deferred income taxes (152) (445) (401)
Goodwill impairment charges     119
Severance charges 99 102  
Gain on divestiture of IS&GS business (1,242)    
Gain on step acquisition of AWE (104)    
Changes in assets and liabilities      
Receivables, net (811) (256) 28
Inventories, net (46) (398) 77
Accounts payable (188) (160) 95
Customer advances and amounts in excess of costs incurred 3 (32) (572)
Postretirement benefit plans 1,028 1,068 (880)
Income taxes 146 (48) 351
Other, net (210) 501 277
Net cash provided by operating activities 5,189 5,101 3,866
Investing activities      
Capital expenditures (1,063) (939) (845)
Acquisitions of businesses and investments in affiliates   (9,003) (898)
Other, net 78 208 20
Net cash used for investing activities (985) (9,734) (1,723)
Financing activities      
Special cash payment from divestiture of IS&GS business 1,800    
Repurchases of common stock (2,096) (3,071) (1,900)
Proceeds from stock option exercises 106 174 308
Dividends paid (2,048) (1,932) (1,760)
Proceeds from the issuance of long-term debt   9,101  
Repayments of long-term debt (952)    
Proceeds from borrowings under revolving credit facilities   6,000  
Repayments of borrowings under revolving credit facilities   (6,000)  
Other, net (267) 5 38
Net cash (used for) provided by financing activities (3,457) 4,277 (3,314)
Net change in cash and cash equivalents 747 (356) (1,171)
Cash and cash equivalents at beginning of year 1,090 1,446 2,617
Cash and cash equivalents at end of year $ 1,837 $ 1,090 $ 1,446