Note 3 - Commitments, Contingencies, and Guarantees - Amount of the Asbestos Litigation Liability (Details)	9 Months Ended
	Sep. 30, 2016 USD ($)
Amended PCC Plan [Member] | Equity Interests [Member]
Fair Value of Asbestos Litigation Liability	$ 238,000,000
Less: Contribution of PCC & PCE Equity Interests - Carrying Value	182,000,000
Gain on Contribution of Equity Interests	56,000,000
Asbestos Litigation Liability	0
Amended PCC Plan [Member] | Fixed Series of Payments [Member]
Fair Value of Asbestos Litigation Liability	290,000,000
Less: Contribution of PCC & PCE Equity Interests - Carrying Value	0
Gain on Contribution of Equity Interests	0
Asbestos Litigation Liability	290,000,000
Non-PCC Asbestos Litigation [Member]
Fair Value of Asbestos Litigation Liability	150,000,000
Less: Contribution of PCC & PCE Equity Interests - Carrying Value	0
Gain on Contribution of Equity Interests	0
Asbestos Litigation Liability	150,000,000
Amended PCC Plan and Non-PCC Asbestos Claims [Member]
Fair Value of Asbestos Litigation Liability	678,000,000
Less: Contribution of PCC & PCE Equity Interests - Carrying Value	182,000,000
Gain on Contribution of Equity Interests	56,000,000
Asbestos Litigation Liability	$ 440,000,000