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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash flows from operating activities:      
Net earnings $ 303 $ 881 $ 1,294
Adjustment to reconcile net earnings to net cash provided by operating activities:      
Depreciation and amortization 2,444 1,420 1,366
Amortization of debt issue costs 24 17 19
Acquisition-related financing foreign exchange (125) 0 0
Asset impairments 87 95 0
Loss (gain) on sale of businesses, investments and other 18 50 (62)
Loss on extinguishment of debt 217 1 196
Stock-based compensation 402 84 107
Deferred income taxes (109) (116) (985)
Net changes in assets and liabilities, net of effects from acquisitions and foreign currency:      
Trade and other receivables (161) 78 (232)
Contract assets 17 (20) 62
Settlement activity (165) 9 (51)
Prepaid expenses and other assets (129) 4 (2)
Deferred contract costs (379) (248) (153)
Deferred revenue 40 (100) 67
Accounts payable, accrued liabilities, and other liabilities (74) (162) 115
Net cash provided by operating activities 2,410 1,993 1,741
Cash flows from investing activities:      
Additions to property and equipment (200) (127) (145)
Additions to software (628) (495) (468)
Acquisitions, net of cash acquired (6,632) 0 0
Net proceeds from sale of businesses and investments 49 (16) 1,307
Other investing activities, net (90) (30) (4)
Net cash provided by (used in) investing activities (7,501) (668) 690
Cash flows from financing activities:      
Borrowings 33,352 26,371 9,615
Repayment of borrowings and other financing obligations (24,672) (26,148) (11,689)
Debt issuance costs (101) (30) (13)
Proceeds from exercise of stock options 161 288 208
Treasury stock activity (453) (1,255) (153)
Dividends paid (656) (421) (385)
Distribution to Brazilian Venture partner 0 (26) (23)
Other financing activities, net (50) (15) (40)
Net cash provided by (used in) financing activities 7,581 (1,236) (2,480)
Effect of foreign currency exchange rate changes on cash 18 (51) 31
Net increase (decrease) in cash and cash equivalents 2,508 38 (18)
Cash and cash equivalents, beginning of year 703 665 683
Cash and cash equivalents, end of year (see Note 2(b)) 3,211 703 665
Supplemental cash flow information:      
Cash paid for interest 332 298 354
Cash paid for income taxes $ 321 $ 503 $ 545