Supplemental Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Interest Expense, Net
Interest expense	$ 207	$ 148	$ 511	$ 290
Interest income	(10)	(20)	(24)	(28)
Interest expense, net	197	128	487	262
Inventories, Net
Finished goods	640		640		$ 341
Work-in-process	1,063		1,063		629
Raw materials	138		138		154
Inventories, net	1,841		1,841		1,124
Property and Equipment, Net
Property and equipment, gross	7,281		7,281		7,105
Less accumulated depreciation	(4,735)		(4,735)		(4,620)
Property and equipment, net	2,546		2,546		$ 2,485
Depreciation expense	102	$ 94	296	$ 286
Pharmacyclics Inc
Interest Expense, Net
Interest expense, net			86
Inventories, Net
Inventories, net	$ 416		$ 416