Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012
CURRENT ASSETS:
Cash and equivalents	$ 62.1	$ 76.3
Trade accounts receivable, less allowances of $10.1 and $10.4, respectively	999.8	1,013.9
Prepaid expenses and other current assets	56.8	57.5
Deferred taxes	36.3	44.9
Total current assets	1,155.0	1,192.6
PROPERTY AND EQUIPMENT:
Property and equipment	336.6	337.6
Accumulated depreciation	(249.1)	(247.7)
Net property and equipment	87.5	89.9
NONCURRENT DEFERRED TAXES	106.6	82.8
GOODWILL, NET	90.3	89.5
OTHER ASSETS	208.6	180.9
TOTAL ASSETS	1,648.0	1,635.7
CURRENT LIABILITIES:
Short-term borrowings	50.2	64.1
Accounts payable and accrued liabilities	311.8	295.6
Accrued payroll and related taxes	250.2	264.5
Accrued insurance	31.4	32.8
Income and other taxes	61.2	65.3
Total current liabilities	704.8	722.3
NONCURRENT LIABILITIES:
Accrued insurance	41.6	43.5
Accrued retirement benefits	120.2	111.0
Other long-term liabilities	22.9	17.9
Total noncurrent liabilities	184.7	172.4
Treasury stock, at cost
Paid-in capital	27.8	27.1
Earnings invested in the business	711.0	700.0
Accumulated other comprehensive income	40.7	35.4
Total stockholders' equity	758.5	741.0
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,648.0	1,635.7
Common Class A [Member] | Stockholders Equity [Member]
Capital stock, $1.00 par value
Common stock, value	36.6	36.6
Treasury stock, at cost
Treasury stock, value	(60.5)	(61.0)
Common Class A [Member]
Treasury stock, at cost
Total stockholders' equity	36.6	36.6
Common Class B [Member] | Stockholders Equity [Member]
Capital stock, $1.00 par value
Common stock, value	3.5	3.5
Treasury stock, at cost
Treasury stock, value	(0.6)	(0.6)
Common Class B [Member]
Treasury stock, at cost
Total stockholders' equity	$ 3.5	$ 3.5