Acquisitions (Details) (USD $) In Millions, unless otherwise specified			7 Months Ended			7 Months Ended
	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2013 Layer 7 [Member]		Jun. 30, 2013 Layer 7 [Member]	Dec. 31, 2013 Layer 7 [Member] Purchased Software [Member]	Dec. 31, 2013 Layer 7 [Member] Minimum [Member]		Dec. 31, 2013 Layer 7 [Member] Maximum [Member]
Allocation of purchase price and estimated useful lives by acquisition
Percentage of voting equity interest acquired					100.00%
Finite-lived intangible assets			$ 26	[1]
Purchased software			87
Goodwill			55
Deferred tax liabilities			(13)
Other assets net of other liabilities assumed			0	[2]
Purchase price			155		155
Cash acquired from acquisition			9
Estimated Useful Life [Abstract]
Finite-lived intangible assets, Estimated useful life						5 years	2 years	[1]	4 years	[1]
Goodwill, Estimated useful life			Indefinite
Acquisitions (Textual) [Abstract]
Accrued acquisition-related costs related to purchase price amounts withheld to support indemnification obligations	$ 33	$ 14

[1] Includes customer relationships and trade names.

[2] Includes approximately $9 million of cash acquired.