Fair Value of Financial Instruments #3 (Unaudited) (Details) - Pension Plan [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, contributions by Employer	$ 20	$ 20	$ 564	$ 59
Voluntary Contributions [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, contributions by Employer			$ 500