Consolidated Statements Of Cash Flows (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
OPERATING ACTIVITIES      
Net income $ 875 $ 8 $ 98
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation, amortization and accretion 220 227 264
Stock-based compensation 144 150 164
Acquisition-related contingent consideration (3) (35) (64)
Net losses (gains) on investments 0 (2) 37
Non-cash restructuring charges 0 0 7
Change in assets and liabilities:      
Receivables, net (54) (12) 56
Inventories 19 (13) 16
Other assets 87 (56) 15
Accounts payable (46) (18) (78)
Accrued and other liabilities 31 (3) (106)
Deferred income taxes, net 1 16 (7)
Deferred net revenue (online-enabled games) (207) 446 (4)
Net cash provided by operating activities 1,067 712 324
INVESTING ACTIVITIES      
Capital expenditures (95) (97) (106)
Proceeds from sale of marketable equity securities 0 0 72
Proceeds from maturities and sales of short-term investments 727 401 459
Purchase of short-term investments (1,102) (600) (414)
Acquisition-related restricted cash 0 0 31
Acquisition of subsidiaries, net of cash acquired 0 (5) (10)
Net cash provided by (used in) investing activities (470) (301) 32
FINANCING ACTIVITIES      
Proceeds from issuance of common stock 60 77 34
Payments of debt issuance costs 0 0 (2)
Excess tax benefit from stock-based compensation 22 13 0
Repurchase and retirement of common stock (337) 0 (349)
Acquisition-related contingent consideration payment 0 (1) (28)
Net cash provided by (used in) financing activities (255) 89 (345)
Effect of foreign exchange on cash and cash equivalents (56) (10) (12)
Increase (decrease) in cash and cash equivalents 286 490 (1)
Beginning cash and cash equivalents 1,782 1,292 1,293
Ending cash and cash equivalents 2,068 1,782 1,292
Supplemental cash flow information:      
Cash paid during the year for income taxes, net 2 29 26
Cash paid during the year for interest 6 6 5
Non-cash investing activities:      
Change in unrealized net gains and losses on available-for-sale securities $ 1 $ 0 $ (46)