Supplemental Disclosures to the Consolidated Statements of Cash Flows (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Deferred and contingent consideration from prior years acquisition	$ 63	$ 39
Contingent consideration from prior year's acquisitions	24	11
Net charge for adjustments related to acquisition related accounts	18	21
Payment of contingent consideration	26	21
Non-cash issuance of common stock	70	67
Stock-based compensation expense, equity awards	43	33
Prior Fiscal Periods Acquisitions
Deferred purchase consideration from prior years' acquisitions	39	28
Contingent consideration from prior year's acquisitions	$ 50	33
Putnam
Reduction of net cash flow for operations by discontinued operations		$ 82