Long-Term Debt and Financing Arrangements (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011	Aug. 17, 2007	Jan. 01, 2011 Notes payable due 2011	Dec. 31, 2011 Notes payable due 2012	Jan. 01, 2011 Notes payable due 2012	Dec. 31, 2011 Convertible notes payable due in 2012	Jan. 01, 2011 Convertible notes payable due in 2012	Aug. 31, 2007 Convertible notes payable due in 2012	Dec. 31, 2011 Notes payable due 2013	Jan. 01, 2011 Notes payable due 2013	Sep. 30, 2008 Notes payable due 2013	Dec. 31, 2011 Notes payable due 2014	Jan. 01, 2011 Notes payable due 2014	Dec. 31, 2011 Notes 8 Point 95 Percent Due 2014	Jan. 01, 2011 Notes 8 Point 95 Percent Due 2014	Dec. 31, 2011 Notes payable due 2016	Jan. 01, 2011 Notes payable due 2016	Dec. 31, 2011 Convertible notes payable due in 2018 (subordinated)	Jan. 01, 2011 Convertible notes payable due in 2018 (subordinated)	Dec. 31, 2011 Notes payable due 2021	Nov. 30, 2011 Notes payable due 2021	Dec. 31, 2011 Notes payable due 2028	Jan. 01, 2011 Notes payable due 2028	Dec. 31, 2011 Notes payable due 2040	Jan. 01, 2011 Notes payable due 2040	Aug. 31, 2010 Notes payable due 2040	Dec. 31, 2011 Other, payable in varying amounts through 2021	Jan. 01, 2011 Other, payable in varying amounts through 2021	Dec. 31, 2011 Other, payable in varying amounts through 2021 Minimum	Jan. 01, 2011 Other, payable in varying amounts through 2021 Minimum	Dec. 31, 2011 Other, payable in varying amounts through 2021 Maximum	Jan. 01, 2011 Other, payable in varying amounts through 2021 Maximum
Debt Instrument [Line Items]
Long-term debt, interest rate				7.13%	4.90%	4.90%			1.85%	6.15%	6.15%	6.15%	4.75%	4.75%	8.95%	8.95%	5.75%	5.75%	4.25%	4.25%	3.40%	3.40%	7.05%	7.05%	5.20%	5.20%	5.20%			0.00%	0.00%	7.14%	7.14%
Convertible Notes, interest rate below 3-month LIBOR			5.125%				3.50%	3.50%
Long-term debt, including current maturities	$ 3,452.2	$ 3,434.2		$ 409.2	$ 204.2	$ 208.4	$ 316.1	$ 305.1		$ 259.2	$ 260.8		$ 312.7	$ 307.9	$ 388.7	$ 405.3	$ 330.5	$ 316.0	$ 632.5	$ 632.5	$ 402.9		$ 167.5	$ 168.5	$ 399.7	$ 399.7		$ 38.2	$ 20.8
Less: Current maturities of long-term debt	(526.4)	(416.1)
Long-term debt	$ 2,925.8	$ 3,018.1