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Earnings Per Share and Shareholders Equity Transactions (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share and Shareholders’ Equity Transactions [Abstract]
Antidilutive securities excluded from calculation of earnings per share	0.7	0.7	0.7
Repurchases common stock, authorized	$ 600	$ 600
Repurchases common stock, available for repurchases	130.3	130.3
Repurchases common stock, shares		0.1
Repurchases common stock, value		$ 6.7

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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