Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Data (Unaudited) [Abstract]

Quarterly data

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
Year Ended December 31, 2012
Revenues from services	$	5,096.4	$	5,206.7	$	5,172.3	$	5,202.6	$	20,678.0
Gross profit		847.4		861.7		856.2		876.7		3,442.0
Operating profit(a)		93.8		94.4		118.6		104.9		411.7
Net earnings		40.2		41.0		63.1		53.3		197.6
Net earnings per share — basic	$	0.50	$	0.51	$	0.79	$	0.68	$	2.49
Net earnings per share — diluted(b)		0.50		0.51		0.79		0.68		2.47
Dividends per share		—		0.43		—		0.43		0.86
Market price:
High	$	47.37	$	47.90	$	41.65	$	42.93
Low		36.76		33.99		32.41		35.18
Year Ended December 31, 2011
Revenues from services	$	5,072.4	$	5,667.3	$	5,782.3	$	5,484.0	$	22,006.0
Gross profit		857.6		962.2		951.3		935.2		3,706.3
Operating profit(c)		85.6		150.8		158.0		129.8		524.2
Net earnings		35.7		72.7		79.6		63.6		251.6
Net earnings per share — basic	$	0.44	$	0.89	$	0.97	$	0.79	$	3.08
Net earnings per share — diluted(d)		0.43		0.87		0.97		0.78		3.04
Dividends per share		—		0.40		—		0.40		0.80
Market price:
High	$	68.67	$	68.14	$	58.62	$	45.92
Low		58.60		52.37		32.32		32.63

(a)	Included reorganization charges of $0.1, $20.9, $1.2 and $26.6 recorded in the first, second, third and fourth quarters, respectively.
(b)	Included in the results are reorganization costs of ($0.17) per diluted share in the second quarter and ($0.23) per diluted share in the fourth quarter.
(c)	Included reorganization charges of $0.2, $1.4, $0.5 and $21.0 recorded in the first, second, third and fourth quarters, respectively.
(d)	Included in the results are reorganization costs of ($0.02) per diluted share in the second quarter and ($0.20) per diluted share in the fourth quarter.