Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly data

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
Year Ended December 31, 2015
Revenues from services	$	4,542.2	$	4,861.3	$	4,972.5	$	4,953.9	$	19,329.9
Gross profit	762.0		830.6		852.1		851.1		3,295.8
Operating profit(a)	122.8		178.7		206.3		181.1		688.9
Net earnings(b)	65.7		105.7		123.9		123.9		419.2
Net earnings per share — basic	$	0.83	$	1.35	$	1.63	$	1.67	$	5.46
Net earnings per share — diluted(c)	0.83		1.33		1.61		1.66		5.40
Dividends per share	—		0.80		—		0.80		1.60
Market price:
High	$	86.92	$	92.00	$	96.56	$	93.24
Low	63.79		82.76		77.43		80.48
Year Ended December 31, 2014
Revenues from services	$	4,904.0	$	5,321.7	$	5,416.0	$	5,121.1	$	20,762.8
Gross profit	816.5		897.3		905.6		868.8		3,488.2
Operating profit	126.9		187.4		212.3		193.3		719.9
Net earnings	70.1		109.8		130.5		117.2		427.6
Net earnings per share — basic	$	0.88	$	1.37	$	1.64	$	1.49	$	5.38
Net earnings per share — diluted	0.86		1.35		1.61		1.47		5.30
Dividends per share	—		0.49		—		0.49		0.98
Market price:
High	$	86.73	$	86.26	$	86.15	$	71.17
Low	72.45		74.00		70.10		59.00

(a) Included restructuring costs of $16.4 recorded in the fourth quarter.

(b) Included non-operating gains of $10.6 recorded in the fourth quarter.

(c) Included in the results are restructuring costs per diluted share of $(0.17) and non-operating gains per diluted share of $0.15 for the fourth quarter.