Income Taxes (Tables)

3 Months Ended

Mar. 31, 2016

Income Tax Disclosure [Abstract]

Summary of Unrecognized Tax Benefits [Table Text Block]

	Three Months Ended March 31, 2016
	(Dollars in Millions)
Beginning balance	$	37
Tax positions related to current period:
Additions	1
Tax positions related to prior periods:
Additions	1
Settlements with tax authorities	(7		)
Ending balance	$	32