Consolidated Statements of Earnings (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 29, 2015	Mar. 30, 2014
Income Statement [Abstract]
Revenue from services	$ 1,320.6us-gaap_SalesRevenueServicesNet	$ 1,330.8us-gaap_SalesRevenueServicesNet
Cost of services	1,100.3us-gaap_CostOfServices	1,108.5us-gaap_CostOfServices
Gross profit	220.3us-gaap_GrossProfit	222.3us-gaap_GrossProfit
Selling, general and administrative expenses	208.2	216.0
Earnings from operations	12.1us-gaap_OperatingIncomeLoss	6.3us-gaap_OperatingIncomeLoss
Other expense, net	2.5us-gaap_OtherNonoperatingIncomeExpense	1.7us-gaap_OtherNonoperatingIncomeExpense
Earnings before taxes	9.6	4.6
Income tax expense	5.9us-gaap_IncomeTaxExpenseBenefit	2.1us-gaap_IncomeTaxExpenseBenefit
Net earnings	$ 3.7us-gaap_NetIncomeLoss	$ 2.5us-gaap_NetIncomeLoss
Basic earnings per share (in dollars per share)	$ 0.10us-gaap_EarningsPerShareBasic	$ 0.07us-gaap_EarningsPerShareBasic
Diluted earnings per share (in dollars per share)	$ 0.10us-gaap_EarningsPerShareDiluted	$ 0.07us-gaap_EarningsPerShareDiluted
Dividends per share (in dollars per share)	$ 0.05	$ 0.05
Average shares outstanding (millions):
Basic (in shares)	37.7	37.4
Diluted (in shares)	37.8	37.4

Aggregate dividends paid during the period for each share of common stock outstanding.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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