Debt Obligations Senior Secured Credit Facility (Details) (USD $) In Millions, unless otherwise specified																9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Period One [Member]	Sep. 30, 2014 Period Two [Member]	Sep. 30, 2014 Period Three [Member]	Sep. 30, 2014 Period Four [Member]	Sep. 30, 2014 Period Five [Member]	Sep. 30, 2014 Term Loan [Member]		Dec. 31, 2013 Term Loan [Member]		Jan. 10, 2014 Credit Facility [Domain]	Sep. 30, 2014 Secured Debt [Member] Revolving [Member]	Sep. 30, 2014 Secured Debt [Member] Term Loan [Member]	Jan. 10, 2014 Digital Insight [Member] Revolving Credit Facility [Member]	Sep. 30, 2014 Federal Funds Rate [Member] Secured Debt [Member]	Sep. 30, 2014 Base Rate [Member] Secured Debt [Member]	Sep. 30, 2014 Maximum [Member] Base Rate [Member] Secured Debt [Member]	Sep. 30, 2014 Maximum [Member] LIBOR [Member] Secured Debt [Member]	Sep. 30, 2014 Minimum [Member] Base Rate [Member] Secured Debt [Member]	Sep. 30, 2014 Minimum [Member] LIBOR [Member] Secured Debt [Member]	Sep. 30, 2014 Quarterly installments beginning September 30, 2014 [Member] Secured Debt [Member]	Sep. 30, 2014 Quarterly installments beginning September 30, 2015 [Member] Secured Debt [Member]	Sep. 30, 2014 Quarterly installments beginning September 30, 2016 [Member] Secured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 3,660	$ 3,320						$ 1,271	[1]	$ 1,087	[1]	$ 250			$ 300
Secured Credit Facility Maximum Borrowing Amount													850	1,350
Debt Instrument, Periodic Payment																						17	26	34
Debt Instrument, Basis Spread on Variable Rate																0.50%	1.00%
Debt Instrument, Margin for Base Rate Loans																		1.25%	2.25%	0.25%	1.25%
Debt Instrument Covenant Consolidated Leverage Ratio			4.85	4.50	4.25	4.00	3.75
Debt Instrument Covenant Interest Coverage Ratio			3.00	3.5
Debt Instrument Covenant Maximum Consolidated Leverage Ratio	4.60
Available Additional Amount of Incremental Term Loan or Incremental Revolving Commitment	$ 150

[1] Interest rates are weighted average interest rates as of September 30, 2014 and December 31, 2013 related to the Senior Secured Credit Facility, which incorporate the impact of the interest rate swap agreement described in Note 12, "Derivatives and Hedging Instruments."