v3.5.0.2
Condensed Consolidating Financial Statements Condensed Consolidating Statements of Cash Flows (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items]    
Payments for (Proceeds from) Other Investing Activities $ (70)  
Net cash provided by (used in) operating activities 1,508 $ 890
Cash flows from investing activities:    
Increase in restricted cash 18 14
Payments to Acquire Equity Method Investments (70) (60)
Proceeds from term deposits and sales of available-for-sale investments   1,084
Capital expenditures and capitalized software development costs (254) (192)
Net cash provide by (used in) investing activities (306) 846
Cash flows from financing activities:    
Repayments of debt facilities and issuance costs for debt facilities (1,006) (681)
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises 0 (605)
Payments to Acquire Additional Interest in Subsidiaries 0 128
Payments Related to Tax Withholding for Share-based Compensation (51) (42)
Proceeds From (Payments For) Other Financing Activities, Condensed (53) (36)
Intercompany borrowing 0 0
Dividends to shareholders (307) (242)
Intercompany dividends 0 0
Net cash used in financing activities (1,366) (1,692)
Effect of exchange rates on cash and cash equivalents (5) (9)
Net increase (decrease) in cash and cash equivalents (169) 35
Cash and cash equivalents, beginning of period 627 652
Cash and cash equivalents, end of period 458  
Payments for Loans to Subsidiaries and Affiliates 0 0
Guarantor Subsidiaries [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Payments for (Proceeds from) Other Investing Activities 0  
Net cash provided by (used in) operating activities 78 346
Cash flows from investing activities:    
Increase in restricted cash 0 0
Payments to Acquire Equity Method Investments   0
Proceeds from term deposits and sales of available-for-sale investments   1,084
Capital expenditures and capitalized software development costs 0 0
Net cash provide by (used in) investing activities (2,168) 680
Cash flows from financing activities:    
Repayments of debt facilities and issuance costs for debt facilities 0 (1,029)
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises   0
Payments to Acquire Additional Interest in Subsidiaries   0
Proceeds From (Payments For) Other Financing Activities, Condensed 0 0
Intercompany borrowing 2,090 (2)
Dividends to shareholders 0 0
Intercompany dividends 0  
Net cash used in financing activities 2,090 (1,031)
Effect of exchange rates on cash and cash equivalents 0 0
Net increase (decrease) in cash and cash equivalents 0 (5)
Cash and cash equivalents, beginning of period 0 5
Cash and cash equivalents, end of period 0  
Payments for Loans to Subsidiaries and Affiliates 2,168 404
Parent Company [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Payments for (Proceeds from) Other Investing Activities 0  
Net cash provided by (used in) operating activities 25 182
Cash flows from investing activities:    
Increase in restricted cash 0 0
Payments to Acquire Equity Method Investments   0
Proceeds from term deposits and sales of available-for-sale investments   0
Capital expenditures and capitalized software development costs 0 0
Net cash provide by (used in) investing activities (138) (301)
Cash flows from financing activities:    
Repayments of debt facilities and issuance costs for debt facilities (1,006) 348
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises   (605)
Payments to Acquire Additional Interest in Subsidiaries   0
Proceeds From (Payments For) Other Financing Activities, Condensed (32) (33)
Intercompany borrowing 1,458 646
Dividends to shareholders (307) (242)
Intercompany dividends 0 0
Net cash used in financing activities 113 114
Effect of exchange rates on cash and cash equivalents 0 0
Net increase (decrease) in cash and cash equivalents 0 (5)
Cash and cash equivalents, beginning of period 1 6
Cash and cash equivalents, end of period 1  
Payments for Loans to Subsidiaries and Affiliates 138 301
Guarantor Subsidiaries B [Member]    
Cash flows from financing activities:    
Intercompany dividends   0
Non-Guarantor Subsidiaries [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Payments for (Proceeds from) Other Investing Activities (70)  
Net cash provided by (used in) operating activities 1,477 465
Cash flows from investing activities:    
Increase in restricted cash 18 14
Payments to Acquire Equity Method Investments   (60)
Proceeds from term deposits and sales of available-for-sale investments   0
Capital expenditures and capitalized software development costs (254) (192)
Net cash provide by (used in) investing activities (2,944) (1,080)
Cash flows from financing activities:    
Repayments of debt facilities and issuance costs for debt facilities 0 0
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises   0
Payments to Acquire Additional Interest in Subsidiaries   128
Proceeds From (Payments For) Other Financing Activities, Condensed (21) (3)
Intercompany borrowing 1,396 903
Dividends to shareholders 0 0
Intercompany dividends (72) (103)
Net cash used in financing activities 1,303 669
Effect of exchange rates on cash and cash equivalents (5) (9)
Net increase (decrease) in cash and cash equivalents (169) 45
Cash and cash equivalents, beginning of period 626 641
Cash and cash equivalents, end of period 457  
Payments for Loans to Subsidiaries and Affiliates 2,638 842
Consolidation, Eliminations [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Payments for (Proceeds from) Other Investing Activities 0  
Net cash provided by (used in) operating activities (72) (103)
Cash flows from investing activities:    
Increase in restricted cash 0 0
Payments to Acquire Equity Method Investments   0
Proceeds from term deposits and sales of available-for-sale investments   0
Capital expenditures and capitalized software development costs 0 0
Net cash provide by (used in) investing activities 4,944 1,547
Cash flows from financing activities:    
Repayments of debt facilities and issuance costs for debt facilities 0 0
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises   0
Payments to Acquire Additional Interest in Subsidiaries   0
Proceeds From (Payments For) Other Financing Activities, Condensed 0 0
Intercompany borrowing (4,944) (1,547)
Dividends to shareholders 0 0
Intercompany dividends 72 103
Net cash used in financing activities (4,872) (1,444)
Effect of exchange rates on cash and cash equivalents 0 0
Net increase (decrease) in cash and cash equivalents 0 0
Cash and cash equivalents, beginning of period 0 0
Cash and cash equivalents, end of period 0  
Payments for Loans to Subsidiaries and Affiliates $ (4,944) $ (1,547)