Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Intangible Assets
Aggregate pre-tax amortization expense	$ 122	$ 140
Continuing Operations [Member]
Other Intangible Assets
Aggregate pre-tax amortization expense	122	$ 139
Pre-tax amortization expense, 2016	207
Pre-tax amortization expense, 2017	207
Pre-tax amortization expense, 2018	208
Pre-tax amortization expense, 2019	213
Pre-tax amortization expense, 2020	200
Pre-tax amortization expense, 2021	$ 147