Asbestos-Related Litigation (Details) (USD $) Share data in Millions, unless otherwise specified	1 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended			1 Months Ended	3 Months Ended		3 Months Ended	24 Months Ended	12 Months Ended	24 Months Ended	3 Months Ended	4 Months Ended	3 Months Ended
	Mar. 31, 2003 claim	Mar. 31, 2013 claim	Dec. 31, 2012	Dec. 31, 2012	Apr. 02, 2001 lawsuit	Mar. 31, 2013 Low	Mar. 31, 2013 High	Dec. 31, 2012 Threatened Litigation [Member]	Mar. 31, 2003 Property Damage Litigation claim	Mar. 31, 2013 Property Damage Litigation lawsuit claim	Apr. 02, 2001 Property Damage Litigation lawsuit	Mar. 31, 2013 Property Damage Litigation Zonolite Attic Insulation ("ZAI") lawsuit item	Dec. 31, 2001 Property Damage Litigation Zonolite Attic Insulation ("ZAI") lawsuit	Dec. 31, 2009 Property Damage Litigation Zonolite Attic Insulation ("ZAI") Canada claim	Dec. 31, 2005 Property Damage Litigation Zonolite Attic Insulation ("ZAI") Canada lawsuit	Mar. 31, 2013 Property Damage Litigation Zonolite Attic Insulation ("ZAI") United States (U.S.) item	Oct. 31, 2008 Property Damage Litigation Zonolite Attic Insulation ("ZAI") United States (U.S.) claim	Mar. 31, 2013 Personal Damage Trust [Member] claim	Mar. 31, 2003 Personal Damage Trust [Member] claim	Apr. 02, 2001 Personal Injury Litigation claim
Asbestos contingencies
Number of pending lawsuits					65,656					16	17	8
Number of settled and dismissed claims									1
Number of pending claims																				129,191
Number of lawsuits filed prior to the filing date											380
Number of lawsuits related to former asbestos containing products										8		2
Bankruptcy Claims, Non Asbestos Related Pending Number	9,500																	3,300	4,400
Number of bankruptcy claims outstanding		5								430
Number of bankruptcy claims settled										410
Amount of bankruptcy claims settled										$ 151,700,000
Number of purported class action lawsuits													8		10
Number of bankruptcy claims filed	14,900													13,100			17,960	4,335
Number of additional bankruptcy claims filed																1,310
Asbestos-Related Liability
Asbestos-related contingencies		2,065,000,000	2,065,000,000	2,065,000,000				2,065,000,000
Provision for asbestos-related contingencies			365,000,000	365,000,000
Number of warrants issued by entity to fund trust (in shares)		10
Exercise price of warrant (in dollars per share)		17.00
Settlement of warrant at cash value						375,000,000	490,000,000
Deferred payment obligation per year for five years beginning January 2, 2019		110,000,000
Deferred payment obligation per year for ten years beginning January 2, 2024		100,000,000
Estimated deferred payment obligation		547,000,000
Insurance Rights
Amount agreed by the insurers, to be paid to the PI trust in respect of claims for which the company was provided coverage under the affected policies		395,200,000
Maximum aggregate amount available under settlement agreements		487,000,000
Excess coverage amount with no agreements with insurers		483,000,000
Minimum estimated eligible claims to access total coverage		4,000,000,000
Remaining excess coverage available from solvent insurers		970,000,000
Amount to fund the PI and PD Trusts		528,000,000
Asbestos Related Insurance		$ 500,000,000	$ 500,000,000	$ 500,000,000