Revenue (Policies)	3 Months Ended
Revenue (Policies)	Mar. 30, 2018
Revenue Recognition [Abstract]
Revenue Recognition	Revenue Recognition—We derive revenues primarily from the sale of Professional Instrumentation and Industrial Technologies products and services. Revenue is recognized when control of promised products or services is transferred to customers in an amount that reflects the consideration we expect to be entitled to in exchange for those products or services. For revenue related to a product or service to qualify for recognition, we must have an enforceable contract with a customer that defines the goods or services to be transferred and the payment terms related to those goods or services. Further, collection of substantially all consideration for the goods or services transferred must be probable based on the customer’s intent and ability to pay the promised consideration. We apply judgment in determining the customer’s ability and intention to pay, which is based on a combination of financial and qualitative factors, including the customers’ financial condition, collateral, debt-servicing ability, past payment experience and credit bureau information. Customer allowances and rebates, consisting primarily of volume discounts and other short-term incentive programs, are considered in determining the transaction price for the contract; these allowances and rebates are reflected as a reduction in the contract transaction price. Significant judgment is exercised in determining product returns, customer allowances and rebates, and are estimated based on historical experience and known trends. Most of our sales contracts contain standard terms and conditions. We evaluate contracts to identify distinct goods and services promised in the contract (performance obligations). Sometimes this evaluation involves judgment to determine whether the goods or services are highly dependent on or highly interrelated with one another, or whether such goods or services significantly modify or customize one another. Certain customer arrangements include multiple performance obligations, typically hardware, installation, training, consulting, services and/or post contract support (“PCS”). Generally, these elements are delivered within the same reporting period, except PCS or other services. We allocate the contract transaction price to each performance obligation using the observable price that the good or service sells for separately in similar circumstances and to similar customers, and/or a residual approach when the observable selling price of a good or service is not known and is either highly variable or uncertain. Allocating the transaction price to each performance obligation sometimes requires significant judgment. Our principal terms of sale are FOB Shipping Point, or equivalent, and, as such, we primarily record revenue upon shipment as we have transferred control to the customer at that point and our performance obligations are satisfied. We evaluate contracts with delivery terms other than FOB Shipping Point and recognize revenue when we have transfered control and satisfied our performance obligations. If any significant obligation to the customer with respect to a sales transaction remains to be fulfilled following shipment (typically installation, other services noted above or acceptance by the customer), revenue recognition is deferred until such obligations have been fulfilled. Further, revenue related to separately priced extended warranty and product maintenance agreements is deferred when appropriate and recognized as revenue over the term of the agreement.
Contract Assets	Contract Assets — In certain circumstances, we record contract assets which include unbilled amounts typically resulting from sales under contracts when revenue recognized exceeds the amount billed to the customer, and right to payment is not only subject to the passage of time.
Contract Costs	Contract Costs — We incur direct incremental costs to obtain certain contracts, typically sales-related commissions. Deferred sales-related commissions are generally not capitalized as the amortization period is one year or less, and we elected to use the practical expedient to expense these sales commissions as incurred.
Contract Liabilities	Contract Liabilities — Our contract liabilities consist of deferred revenue generally related to PCS and extended warranty sales, where in most cases we receive up-front payment and recognize revenue over the support term. We classify deferred revenue as current or noncurrent based on the timing of when we expect to recognize revenue. The noncurrent portion of deferred revenue is included in other long-term liabilities in the accompanying Consolidated Condensed Balance Sheets.
Remaining Performance Obligation	Remaining Performance Obligations — Our remaining performance obligations represent the transaction price of firm, noncancelable orders, with expected delivery dates to customers greater than one year from March 30, 2018, for which work has not been performed. We have excluded performance obligations with an original expected duration of one year or less from the amounts below.