Contingencies and Litigation Litigation (Details) - State Of Texas v. Xerox Corporation, Xerox State Healthcare, LLC, and ACS State Healthcare, LLC [Member] $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 110
Loss Contingency, Damages Awarded, Value	236
loss contingencies, agreed upon settlement amount to be paid at signing	20
loss contingencies, agreed upon settlement amount to be paid 2 months after signing	20
loss contingencies, agreed upon settlement amount to be paid within 6 months after signing	38
loss contingencies, agreed upon settlement amount to be paid after 1 year	79
loss contingencies, agreed upon settlement amount to be paid after 2 year	79
Loss Contingency Accrual, Period Increase (Decrease)	113
Loss contingencies, discount amount	$ 13