Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Subsequent Events (Details) - USD ($) $ in Millions		6 Months Ended
Subsequent Events (Details) - USD ($) $ in Millions	Jul. 09, 2015	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Subsequent Event [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		$ 61	$ 1,694
Goodwill		$ 16,185		$ 16,134
Virtustream [Member] \| Subsequent Event
Subsequent Event [Line Items]
Aggregate consideration	$ 1,200
Intangible assets	380
Aggregate allocation to net liabilities	(50)
Payments to Acquire Businesses, Net of Cash Acquired	1,176
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	1
Goodwill	$ 850