CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Cash flows from operating activities:    
Net income $ 718.9 $ 279.7
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 28.1 25.5
Amortization 66.6 71.6
Deferred income taxes (106.6) (80.4)
Change in value of contingent consideration 19.0 8.6
Share-based compensation expense 128.8 104.4
Share-based employee benefit plan expense 7.7 7.4
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 69.2 (1.9)
Unrealized change in value of derivative instruments 62.2 4.4
Other, net 2.7 (1.1)
Change in current assets and liabilities, excluding the effect of acquisitions:    
Accounts receivable (59.5) (9.8)
Inventory 7.3 (7.0)
Other operating assets (26.4) 29.9
Accounts payable and other operating liabilities 59.2 111.5
Income tax payable 15.8 11.3
Payment of contingent consideration 0 (5.0)
Deferred revenue 1.9 4.2
Net cash provided by operating activities 856.5 557.1
Cash flows from investing activities:    
Proceeds from sales of marketable securities available for sale 1,079.8 588.3
Purchases of marketable securities available for sale (678.8) (766.7)
Capital expenditures (42.3) (24.7)
Purchases of investment securities (20.7) (17.5)
Other investing activities 0 0.5
Net cash provided by (used in) investing activities 338.0 (220.1)
Cash flows from financing activities:    
Payment for treasury shares (1,012.6) (1,568.5)
Proceeds from short-term borrowing 90.0 1,460.0
Principal repayments on short-term borrowing (189.6) (1,135.0)
Proceeds from sale of common equity put options 5.2 1.2
Payment of contingent consideration 0 (15.0)
Net proceeds from share-based compensation arrangements 114.4 59.2
Excess tax benefit from share-based compensation arrangements 84.5 29.6
Net cash used in financing activities (908.1) (1,168.5)
Effect of currency rate changes on cash and cash equivalents (40.3) (6.3)
Net increase (decrease) in cash and cash equivalents 246.1 (837.8)
Cash and cash equivalents at beginning of period 4,121.6 3,234.4
Cash and cash equivalents at end of period 4,367.7 2,396.6
Supplemental schedule of non-cash investing and financing activity:    
Change in net unrealized (gain) loss on marketable securities available for sale 77.1 (84.3)
Investment in NantBioScience, Inc. preferred equity 0 90.0
Supplemental disclosure of cash flow information:    
Interest paid 50.2 52.2
Income taxes paid $ 106.7 $ 96.6