Debt and Credit Facilities (Details Textual) (USD $)	3 Months Ended	12 Months Ended						3 Months Ended	12 Months Ended		12 Months Ended				12 Months Ended																										12 Months Ended																	12 Months Ended				12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Jan. 03, 2009	Jan. 17, 2012	Oct. 25, 2011	Dec. 31, 2011 4.50% convertible senior notes due 2013	Dec. 31, 2011 4.50% convertible senior notes due 2013	Oct. 13, 2011 4.50% convertible senior notes due 2013	Dec. 31, 2011 Convertible Note	Jan. 02, 2010 Convertible Note	Jan. 01, 2011 Convertible Note	May 05, 2009 Convertible Note	Dec. 31, 2011 Convertible Note Maximum [Member]	Dec. 31, 2011 Convertible Note Minimum [Member]	Dec. 31, 2011 Manufacturing Group [Member]	Jan. 02, 2010 Manufacturing Group [Member]	Dec. 31, 2011 Manufacturing Group [Member] Medium-term notes due 2011 (weighted-average rate of 9.83%)	Jan. 01, 2011 Manufacturing Group [Member] Medium-term notes due 2011 (weighted-average rate of 9.83%)	Dec. 31, 2011 Manufacturing Group [Member] 6.50% due 2012	Jan. 01, 2011 Manufacturing Group [Member] 6.50% due 2012	Dec. 31, 2011 Manufacturing Group [Member] 3.875% due 2013	Jan. 01, 2011 Manufacturing Group [Member] 3.875% due 2013	Dec. 31, 2011 Manufacturing Group [Member] 4.50% convertible senior notes due 2013	Jan. 01, 2011 Manufacturing Group [Member] 4.50% convertible senior notes due 2013	Dec. 31, 2011 Manufacturing Group [Member] 4.625% due 2016	Jan. 01, 2011 Manufacturing Group [Member] 4.625% due 2016	Dec. 31, 2011 Manufacturing Group [Member] 6.20% due 2015	Jan. 01, 2011 Manufacturing Group [Member] 6.20% due 2015	Dec. 31, 2011 Manufacturing Group [Member] 5.60% due 2017	Jan. 01, 2011 Manufacturing Group [Member] 5.60% due 2017	Dec. 31, 2011 Manufacturing Group [Member] 7.25% due 2019	Jan. 01, 2011 Manufacturing Group [Member] 7.25% due 2019	Dec. 31, 2011 Manufacturing Group [Member] 6.625% due 2020	Jan. 01, 2011 Manufacturing Group [Member] 6.625% due 2020	Dec. 31, 2011 Manufacturing Group [Member] 5.95% due 2021	Jan. 01, 2011 Manufacturing Group [Member] 5.95% due 2021	Dec. 31, 2011 Manufacturing Group [Member] Other (weighted-average rate of 3.72% and 3.12%, respectively)	Jan. 01, 2011 Manufacturing Group [Member] Other (weighted-average rate of 3.72% and 3.12%, respectively)	Dec. 31, 2011 Finance Group [Member]	Jan. 01, 2011 Finance Group [Member]	Jan. 02, 2010 Finance Group [Member]	Dec. 31, 2011 Finance Group [Member] Due 2011 (weighted-average rate of 3.07%)	Jan. 01, 2011 Finance Group [Member] Due 2011 (weighted-average rate of 3.07%)	Dec. 31, 2011 Finance Group [Member] Due 2012 (weighted-average rate of 4.43% and 4.43%, respectively)	Jan. 01, 2011 Finance Group [Member] Due 2012 (weighted-average rate of 4.43% and 4.43%, respectively)	Dec. 31, 2011 Finance Group [Member] Due 2013 (weighted-average rate of 4.50% and 4.46%, respectively)	Jan. 01, 2011 Finance Group [Member] Due 2013 (weighted-average rate of 4.50% and 4.46%, respectively)	Dec. 31, 2011 Finance Group [Member] Due 2014 (weighted-average rate of 5.07% and 5.07%, respectively)	Jan. 01, 2011 Finance Group [Member] Due 2014 (weighted-average rate of 5.07% and 5.07%, respectively)	Dec. 31, 2011 Finance Group [Member] Due 2015 (weighted-average rate of 2.50% and 3.59%, respectively)	Jan. 01, 2011 Finance Group [Member] Due 2015 (weighted-average rate of 2.50% and 3.59%, respectively)	Dec. 31, 2011 Finance Group [Member] Due 2016 (weighted-average rate of 1.94% and 4.59%, respectively	Jan. 01, 2011 Finance Group [Member] Due 2016 (weighted-average rate of 1.94% and 4.59%, respectively	Dec. 31, 2011 Finance Group [Member] Due 2017 and thereafter (weighted-average rate of 2.86% and 3.31%, respectively)	Jan. 01, 2011 Finance Group [Member] Due 2017 and thereafter (weighted-average rate of 2.86% and 3.31%, respectively)	Dec. 31, 2011 Finance Group [Member] Credit line borrowings due 2012 (weighted-average rate 0.91%)	Jan. 01, 2011 Finance Group [Member] Credit line borrowings due 2012 (weighted-average rate 0.91%)	Dec. 31, 2011 Finance Group [Member] Securitized debt (weighted-average rate of 2.08% and 2.01%, respectively)	Jan. 01, 2011 Finance Group [Member] Securitized debt (weighted-average rate of 2.08% and 2.01%, respectively)	Dec. 31, 2011 Finance Group [Member] 6% Fixed-to-Floating Rate Junior Subordinated Notes	Jan. 01, 2011 Finance Group [Member] 6% Fixed-to-Floating Rate Junior Subordinated Notes	Dec. 31, 2011 Senior Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Facility agreement expires																																																																in March 2015
Senior unsecured revolving credit facility																																																																$ 1,000,000,000
Portion available for issuance of letters of credit against facility																																																																200,000,000
Outstanding under revolving facility																																																																0
Letters of credit issued against credit facility																																																																38,000,000
Debt (Textual) [Abstract]
Interest rate																			9.83%	9.83%	6.50%	6.50%	3.875%	3.875%	4.50%	4.50%	4.625%	4.625%	6.20%	6.20%	5.60%	5.60%	7.25%	7.25%	6.625%	6.625%	5.95%	5.95%																								6.00%	6.00%
Weighted average interest rate																																							3.72%	3.12%				3.07%	3.07%	4.43%	4.43%	4.50%	4.46%	5.07%	5.07%	2.50%	3.59%	1.94%	4.59%	2.86%	3.31%			2.08%	2.01%
Weighted average rate on credit line borrowings due 2012																																																										0.91%	0.91%
Debt discount on convertible notes at date of issuance														134,000,000
Effective interest rate of the convertible notes coupon rate															11.72%	4.50%
Initial conversion rate of shares of common stock issuable per $1000 in principal amount of convertible notes											76.1905
Face value of the notes											216,000,000		600,000,000	600,000,000																																																300,000,000
Unamortized discount											21,000,000		96,000,000
Initial conversion price per share											$ 13.125
Lot size of principal amount of Convertible Notes for conversion into common stock	1,000	1,000
Amount if converted value in excess of face amount								88,000,000	88,000,000
Potential incremental cash payment in excess of the face amount of the notes upon conversion of convertible notes, after giving effect to the exercise of the call options and warrants								45,000,000	45,000,000
Potential incremental share settlement in excess of the face amount of the notes that could be issued upon conversion of convertible notes, after giving effect to the exercise of the call options and warrants								2,400,000	2,400,000
Conversion threshold price per share								$ 17.06	$ 17.06
Convertible at holder's option, convertible date description	through March 31, 2012	through March 31, 2012
Conversion terms: Minimum trading days of common stock within 30 consecutive trading days of preceding calendar quarter		20 days									20 days
Conversion terms: Consecutive trading days ending on last trading day of preceding calendar quarter		30 days									30 days
Conversion terms: Percentage of applicable conversion price per share of common stock on last trading day of preceding calendar quarter that must be exceeded for at least 20 trading days during the 30 consecutive days ending the last trading day of the preceding quarter											130.00%
Conversion terms: Consecutive trading day measurement period in which trading price per $1,000 principal amount of convertible notes for each day was less than 98% of product of last reported sale price of common stock and applicable conversion rate											10 days
Conversion terms: Conversion period after 10-day consecutive trading day measurement period											5 days
Conversion terms: Percentage of product of the last reported sale price of our common stock and the applicable conversion rate											98.00%
Convertible date											any time on or after February 19, 2013
Net proceeds from issuance of long-term debt		926,000,000	231,000,000	918,000,000													496,000,000	595,000,000																							430,000,000	231,000,000	323,000,000
Principal amount of convertible notes outstanding																									195,000,000	504,000,000
Cash and non-cash interest expense incurred											58,000,000	60,000,000
Fixed interest rate on notes																																																														6.00%
Floating variable rate of debt instrument																																																														1.735%
Minimum fixed charge coverage required to be maintained by TFC		125.00%
Minimum shareholder's equity required to be maintain by TFC		200,000,000
Cash paid to TFC to maintain compliance with covenants			182,000,000	383,000,000	270,000,000
Debt Instrument, Maturity Date											May 01, 2013																																																			Feb. 15, 2067
Debt instrument initial fixed rate duration description																																																														Until February 15, 2017
Debt instrument description of variable rate basis after specified term at fixed rate																																																														Three-month London Interbank Offered Rate
Debt Instrument call date earliest																																																														Feb. 15, 2017
Debt Instrument call date latest																																																														Feb. 15, 2042
Replacement capital covenant call date																																																														Feb. 15, 2047
Tender offer settlement date										Oct. 13, 2011
Terms of Tender Offer, Principal amount of convertible notes purchased										1,000
Terms of Tender Offer, cash paid per lot										1,524
Principal amount of convertible notes tendered by holders										225,000,000
Purchased convertible notes in a small number of privately negotiated transactions									151,000,000
Retired in holder-initiated conversion								8,000,000
Cash paid for tendered/purchased convertible notes									580,000,000
Percentage of convertible notes tendered										37.50%
Reduction in the principal amount of the convertible notes									64.00%
Fair value of convertible notes purchased									398,000,000
Equity component of purchased convertible notes									182,000,000
Pretax loss on early extinguishment of debt									(55,000,000)
Carrying amount of purchased convertible notes									343,000,000
Shareholders' equity reduction									182,000,000
Maximum value of capped calls	75,000,000	75,000,000
Additional Debt (Textual) [Abstract]
Variable-rate notes totaled	100,000,000	100,000,000	271,000,000
Stock Price on December 31, 2011	$ 18.49	$ 18.49
Amount paid for maintain compliance with the fixed charge coverage ratio						240,000,000
Call Option and Warrant Transactions (Textual) [Abstract]
Number of shares of common stock covered under call option before reduction							45,700,000
Number of shares of common stock covered under call option after reduction							28,600,000
Number of common shares covered by the warrants after reduction							28,000,000
Proceeds from call option transaction							135,000,000
Payment under warrant transaction							133,000,000
Number of shares of common stock covered under call option after additional reduction	16,500,000	16,500,000
Number of common shares covered by the warrants after additional reduction	16,500,000	16,500,000
Principal amount of convertible notes repurchased that equates to the reduction in the number of shares covered by the call options and warrants		384,000,000
Exercise price of common share		$ 15.75
Amount received from counterparties related to amendment of call option and warrant transaction							20,000,000
Effective Conversion Price of convertible notes before call option and warrant effect		$ 13.125
Effective Conversion Price of convertible notes after call option and warrant effect		$ 15.75
Capped Call (Textual) [Abstract]
Cost of Capped call transaction with counterparties							32,000,000
Common stock covered under capped call transaction							17,100,000
Common shares covered under capped call	28,600,000	28,600,000
Strike price of capped calls	$ 13.125	$ 13.125
Cap price of capped calls	$ 15.75	$ 15.75
Expiration date of capped call		May 2013
Minimum Stock Price	$ 13.125	$ 13.125
Maximum stock price	$ 15.75	$ 15.75
Market value of common stock below which capped call expires with no value	$ 13.125	$ 13.125
Minimum stock price on specified maximum capped value	$ 15.75	$ 15.75
Value of additional capped call transaction paid in lieu of amount due from amendment of option and warrant transactions	$ 20,000,000
Additional shares of common stock covered upon amendment of capped call transaction	11,500,000