Contingencies	9 Months Ended
Contingencies	Sep. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingencies Disclosure	Contingencies We accrue estimates for resolution of any legal and other contingencies when losses are probable and reasonably estimable in accordance with ASC Topic 450, Contingencies. The terms of our agreements with our clients generally provide for limited indemnification of such clients against losses, expenses and liabilities arising from third party or other claims based on, among other things, alleged infringement by our solutions of an intellectual property right of third parties or damages caused by data privacy breaches or system interruptions. The terms of such indemnification often limit the scope of and remedies for such indemnification obligations and generally include, as applicable, a right to replace or modify an infringing solution. For several reasons, including the lack of a sufficient number of prior indemnification claims relating to IP infringement, data privacy breaches or system interruptions, the inherent uncertainty stemming from such claims, and the lack of a monetary liability limit for such claims under the terms of the corresponding agreements with our clients, we cannot determine the maximum amount of potential future payments, if any, related to such indemnification provisions. In addition to commitments and obligations in the ordinary course of business, we are involved in various other legal proceedings and claims that arise in the ordinary course of business, including for example, employment and client disputes and litigation alleging solution and implementation defects, personal injury, intellectual property infringement, violations of law and breaches of contract and warranties. Many of these proceedings are at preliminary stages and many seek an indeterminate amount of damages. At this time, we do not believe the range of potential losses under such claims to be material to our condensed consolidated financial statements. During the three months ended June 29, 2019, we incurred a $20 million pre-tax charge in connection with a client dispute that arose during the same period. The client is continuing to assess the potential for additional damages and claims, and our evaluation of the dispute continues. We have not accrued a reserve for any additional damages or claims at this time because we cannot reasonably determine the probability of a loss and we cannot reasonably estimate the amount of loss, if any. While we can provide no assurances as to the ultimate outcome of this dispute, we believe the amount, if any, we will be required to pay to fully settle this dispute will not have a material adverse impact on our business, results of operations, cash flows or financial condition. No less than quarterly, we review the status of each significant matter underlying a legal proceeding or claim and assess our potential financial exposure. We accrue a liability for an estimated loss if the potential loss from any legal proceeding or claim is considered probable and the amount can be reasonably estimated. Significant judgment is required in both the determination of probability and the determination as to whether the amount of an exposure is reasonably estimable, and accruals are based only on the information available to our management at the time the judgment is made. Furthermore, the outcome of legal proceedings is inherently uncertain, and we may incur substantial defense costs and expenses defending any of these matters. Should any one or a combination of more than one of these proceedings be successful, or should we determine to settle any one or a combination of these matters, we may be required to pay substantial sums, become subject to the entry of an injunction or be forced to change the manner in which we operate our business, which could have a material adverse impact on our business, results of operations, cash flows or financial condition.