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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities:      
Net earnings $ 590 $ 651 $ 707
Adjustment to reconcile net earnings to net cash provided by operating activities:      
Depreciation and amortization 1,174 669 626
Amortization of debt issue costs 19 11 20
Gain on sale of assets 0 (149) 0
Stock-based compensation 137 98 56
Deferred income taxes (164) 48 (6)
Excess income tax benefit from exercise of stock options (32) (29) (40)
Other operating activities, net (2) 4 21
Net changes in assets and liabilities, net of effects from acquisitions and foreign currency:      
Trade receivables 57 (103) (115)
Settlement activity 15 5 (6)
Prepaid expenses and other assets (8) (46) (34)
Deferred contract costs (138) (120) (87)
Deferred revenue 182 63 33
Accounts payable, accrued liabilities, and other liabilities 95 29 (10)
Net cash provided by operating activities 1,925 1,131 1,165
Cash flows from investing activities:      
Additions to property and equipment (145) (133) (149)
Additions to computer software (471) (282) (223)
Acquisitions, net of cash acquired 0 (1,720) (595)
Net proceeds from sale of assets 0 241 0
Other investing activities, net (3) (4) (18)
Net cash used in investing activities (619) (1,898) (985)
Cash flows from financing activities:      
Borrowings 7,745 13,216 7,936
Repayment of borrowings and capital lease obligations (8,749) (11,561) (7,364)
Debt issuance costs (25) (37) (14)
Excess income tax benefit from exercise of stock options 32 29 40
Proceeds from exercise of stock options 112 57 61
Treasury stock activity (40) (320) (522)
Dividends paid (341) (305) (275)
Distributions to Brazilian Venture partner (20) (24) (35)
Other financing activities, net (23) (40) (25)
Net cash (used in) provided by financing activities (1,309) 1,015 (198)
Effect of foreign currency exchange rate changes on cash 4 (59) (37)
Net increase (decrease) in cash and cash equivalents 1 189 (55)
Cash and cash equivalents, beginning of year 682 493 548
Cash and cash equivalents, end of year 683 682 493
Supplemental cash flow information:      
Cash paid for interest 351 142 169
Cash paid for income taxes $ 341 $ 355 $ 292