Organization and Significant Accounting Policies (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Year	Dec. 31, 2010 Interest Expense [Member]	Dec. 31, 2009 Interest Expense [Member]	Dec. 31, 2010 Nonoperating Income Expense [Member]	Dec. 31, 2009 Nonoperating Income Expense [Member]
Summary of Significant Accounting Policies [Line Items]
Restatement impact		$ 735.1	$ 719.8	$ 735.1	$ 719.8
Expected amortization of finite lived intangible assets, years	7.7