Long-Term Debt, Short-Term Debt and Financing Arrangements (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended							5 Months Ended	6 Months Ended	9 Months Ended
	Aug. 07, 2011	Jun. 30, 2011	May 15, 2011	Dec. 31, 2011	Sep. 30, 2011	Mar. 31, 2011	Jun. 02, 2010	Dec. 31, 2011	Feb. 28, 2010	Feb. 27, 2011
Applicable margin over:
LIBOR for Revolving Loans	4.50%		4.25%				4.50%	4.25%	5.50%	4.50%
LIBOR for Tranche B-1 Loans	5.00%		5.00%				5.00%	5.00%	5.50%	5.00%
Prime-based Term Loan A Loans							3.50%		4.50%
Prime for Revolving Loans	3.50%		3.25%					3.25%		3.50%
Prime for Term Loan B Loans	3.75%		3.50%					3.50%		3.75%
Prime for Tranche B-1 Loans	4.00%		4.00%					4.00%		4.00%
Federal Funds for Revolving Loans	3.50%		3.25%					3.25%		3.50%
Federal Funds for Term Loan B Loans	3.75%		3.50%					3.50%		3.75%
Federal Funds for Tranche B-1 Loans	4.00%		4.00%				4.00%	4.00%	5.00%	4.00%
Commitment Fee	0.75%		0.50%				0.50%	0.50%	0.75%	0.75%
Financial Ratios Under Senior Credit Facility
Leverage Ratio Required (Maximum)		3.75		3.50	3.50	4.00
Leverage Ratio Actual (Maximum)		2.17		1.88	2.07	2.32
Interest Coverage Ratio Required (Minimum)		2.55		2.55	2.55	2.55
Interest Coverage Ratio Actual (Minimum)		4.76		5.69	5.17	4.37
Greater than or equal to 3.0x [Member]
Proforma Consolidated Leverage Ratio
Maximum aggregate principal amount of purchases, cancellations and redemptions of senior notes				20
Greater than or equal to 2.5x [Member]
Proforma Consolidated Leverage Ratio
Maximum aggregate principal amount of purchases, cancellations and redemptions of senior notes				100
Less than 2.5x [Member]
Proforma Consolidated Leverage Ratio
Maximum aggregate principal amount of purchases, cancellations and redemptions of senior notes				125
Term Loan B [Member]
Applicable margin over:
LIBOR for Term Loan	4.75%		4.50%					4.50%		4.75%
Term Loan A [Member]
Applicable margin over:
LIBOR for Term Loan							4.50%		5.50%