Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Intangible Assets
Aggregate pre-tax amortization expense	$ 117	$ 119	$ 257	$ 245
Pre-tax amortization expense, 2015	100		100
Pre-tax amortization expense, 2016	354		354
Pre-tax amortization expense, 2017	218		218
Pre-tax amortization expense, 2018	218		218
Pre-tax amortization expense, 2019	204		204
Pre-tax amortization expense, 2020	$ 187		$ 187