Other Income, Net Table (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income				$ 1	$ 5	$ 10
Loss on extinguishment of debt		$ (73)	$ (52)	(73)	(58)	(34)
Reserve for Unsecured Creditors litigation				(300)	0	0
Costs associated with acquisitions				0	(41)	(6)
Gain on insurance recovery				0	0	14
Contingent consideration liability fair value adjustment				(3)	7	0
Other, net				9	(1)	8
Other expense, net				$ (366)	$ (88)	$ (8)
Unsecured Creditors Litigation | Judicial Ruling | Other income (expense), net
Reserve for Unsecured Creditors litigation	$ (300)